6 Ranger/18 Druid. Is this build any good?

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Ranger Druid 
Level 20 Chaotic Neutral Elf Male 
(6 Ranger / 14 Druid) 
Hit Points: 282 
Spell Points: 1183 

BAB: 16/16/21/26/26 
Fortitude: 15 
Reflex: 14 
Will: 17 

              Starting      Ending     Feat/Enhancement 
Abilities    Base Stats   Base Stats    Modified Stats 
(32 Point)    (Level 1)    (Level 20)      (Level 20) 
Strength           14             14                16 
Dexterity          18             18                21 
Constitution       12             12                12 
Intelligence        8              8                 8 
Wisdom             16             21                22 
Charisma            8              8                 8 

              Starting      Ending    Feat/Enhancement 
             Base Skills  Base Skills  Modified Skills 
Skills       (Level 1)    (Level 20)      (Level 20) 
Balance            4              5                5 
Bluff              -1             -1               -1 
Concentration      5              24               24 
Diplomacy          -1             -1               -1 
Disable Device     n/a            n/a              n/a 
Haggle             -1             -1               -1 
Heal               7              15               15 
Hide               4              5                5 
Intimidate         -1             -1               -1 
Jump               6              12               12 
Listen             7              29               31 
Move Silently      4              5                5 
Open Lock          n/a            n/a              n/a 
Perform            n/a            n/a              n/a 
Repair             -1             -1               -1 
Search             -1             -1               1 
Spot               7              29               31 
Swim               2              3                3 
Tumble             n/a            n/a              n/a 
Use Magic Device   n/a            n/a              n/a 
 
Level 1 (Ranger) 
Skill: Concentration (+4) 
Skill: Heal (+4) 
Skill: Jump (+4) 
Skill: Listen (+4) 
Skill: Spot (+4) 
Feat: (Favored Enemy) Favored Enemy: Undead 
Feat: (Selected) Toughness 
Feat: (Automatic) Attack 
Feat: (Automatic) Bow Strength 
Feat: (Automatic) Defensive Fighting 
Feat: (Automatic) Elven Keen Senses 
Feat: (Automatic) Enchantment Save Bonus 
Feat: (Automatic) Heroic Durability 
Feat: (Automatic) Immunity to Sleep 
Feat: (Automatic) Light Armor Proficiency 
Feat: (Automatic) Martial Weapon Proficiency (ALL) 
Feat: (Automatic) Shield Proficiency (General) 
Feat: (Automatic) Simple Weapon Proficiency 
Feat: (Automatic) Sneak 
Feat: (Automatic) Sunder 
Feat: (Automatic) Trip 
Feat: (Automatic) Wild Empathy 
Enhancement: Elven Ranged Damage I 
 
Level 2 (Ranger) 
Skill: Concentration (+1) 
Skill: Heal (+1) 
Skill: Jump (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Automatic) Rapid Shot  
Feat: (Automatic) Two Weapon Fighting 
Enhancement: Ranger Favored Damage I 
Enhancement: Ranger Favored Defense I 
Enhancement: Ranger Dexterity I 
 
Level 3 (Ranger) 
Skill: Concentration (+1) 
Skill: Heal (+1) 
Skill: Jump (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Point Blank Shot 
Feat: (Automatic) Archer's Focus 
Feat: (Automatic) Diehard 
Enhancement: Elven Dexterity I 
Enhancement: Elven Enchantment Resistance I 
Enhancement: Racial Toughness I 
 
Level 4 (Ranger) 
Ability Raise: WIS 
Skill: Concentration (+1) 
Skill: Heal (+1) 
Skill: Jump (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Automatic) Precise Shot 
Enhancement: Elven Ranged Attack I 
Enhancement: Ranger Favored Resistance I 
Enhancement: Ranger Energy of the Wild I 
 
Level 5 (Ranger) 
Skill: Concentration (+1) 
Skill: Heal (+1) 
Skill: Jump (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Favored Enemy) Favored Enemy: Evil Outsider 
Enhancement: Elven Enchantment Resistance II 
Enhancement: Ranger Favored Damage II 
 
Level 6 (Ranger) 
Skill: Concentration (+1) 
Skill: Heal (+1) 
Skill: Jump (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Weapon Focus: Ranged Weapons 
Feat: (Automatic) Improved Two Weapon Fighting 
Feat: (Automatic) Manyshot 
Enhancement: Racial Toughness II 
Enhancement: Ranger Dexterity II 
 
Level 7 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Automatic) Call Wolf Companion 
Feat: (Automatic) Dismiss Charm 
Feat: (Automatic) Druidic Oath 
Feat: (Automatic) Druidic Spontaneous Casting 
Feat: (Automatic) Magical Training 
Feat: (Automatic) Medium Armor Proficiency 
Enhancement: Elven Ranged Damage II 
 
Level 8 (Druid) 
Ability Raise: WIS 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Druid Wild Shape) Wild Shape: Wolf 
Feat: (Automatic) Goodberry 
Enhancement: Druid Aggravate I 
Enhancement: Druid Wisdom I 
Enhancement: Druid Toughness I 
 
Level 9 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Mental Toughness 
Enhancement: Ranger Arcane Archer I 
 
Level 10 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Enhancement: Ranger Arcane Archer: Imbue Force Arrows 
Enhancement: Druid Beastial Nature I 
Enhancement: Druid Waxing Life I 
Enhancement: Druid Eminence of Life I 
 
Level 11 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Druid Wild Shape) Wild Shape: Bear 
Enhancement: Druid Vengeful Hunter I 
Enhancement:: Druid Zenith of Life I 
 
Level 12 (Druid) 
Ability Raise: WIS 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Weapon Finesse 
Enhancement: Druid Nature's Warrior I 
 
Level 13 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Automatic) Improved Wild Empathy 
Enhancement: Druid Aggravate II 
Enhancement: Druid Beastial Nature II 
Enhancement: Druid Reaving Roar 
 
Level 14 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Druid Wild Shape) Wild Shape: Winter Wolf 
Enhancement: Druid Toughness II 
 
Level 15 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Improved Critical: Ranged Weapons 
Feat: (Automatic) Poison Immunity 
Enhancement: Druid Vengeful Hunter II 
 
Level 16 (Druid) 
Ability Raise: WIS 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Enhancement: Druid Strength I 
Enhancement: Druid Strength II 
 
Level 17 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Druid Wild Shape) Wild Shape: Dire Bear 
Enhancement: Elven Ranged Attack II 
 
Level 18 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Selected) Greater Two Weapon Fighting 
Enhancement: Druid Nature's Warrior II 
Enhancement: Druid Waxing Life II 
 
Level 19 (Druid) 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Feat: (Druid Wild Shape) Wild Shape: Water Elemental 
Feat: (Automatic) Thousand Faces 
Enhancement: Druid Zenith of Life II 
Enhancement: Druid Toughness III 
 
Level 20 (Druid) 
Ability Raise: WIS 
Skill: Concentration (+1) 
Skill: Listen (+1) 
Skill: Spot (+1) 
Enhancement: Druid Toughness IV

First off, this is the result of some ideas i've had floating around my head ever since my friends started their Druids, i always thought they were pretty cool classes, but entering mid game content, i've noticed that the Druid is kind-of.....weak, or maybe that's just the way my friends built them or how they play them. I was always fascinated by how great the Reaving Roar was and set out to find a way to combine both TWF with Reaving Roar, but always arrived at a very challanging obstacle to overcome: Balancing all the Attribute Scores would be EXTREMELY difficult without using Tomes (which i'm not against, but i'm not rich either to afford 3 or 4 +2 tomes )

Yesterday, a random question popped into my mind: Does Reaving Roar activate when you kill an enemy using ANY kind of attack? or at least when using a Ranged Attack? My friend told me that it triggered when you used any attack, Melee, Ranged or Spell. With that confirmed, i set out to make a Ranger/Druid (Arcane Archer/Nature Warrior).

My reasoning for going Ranger instead of just Pure Elven Druid (still being able to get the Arcane Archer path) or Druid/Something else: TWF + ITWF + GTWF (which i pick out later) = If needed, i can hop into melee to help out or defend myself. Rapid Shot + Manyshot + Precise Shot seemed like good free feats for an Arcane Archer. Favored Enemy is not groundbreaking, but it helps.

What i'm looking for is the following.

1)
Feats to take and what order to take them in. I took the requirements for Arcane Archer ASAP, but after that, i just took what felt to be good choices, but i'm not sure if they were the best choices?
I skipped out on Improved Mental Toughness because my spellcasting abilities will be secondary and only to help out, i don't plan to depend on my spells for surviving, but rather to help out

2)
What would be better to concentrate on? Dex or Wis? I want my Druid spells to be useful, but are they actually useful? I'm thinking of either concentrating on the Buffs/Offensive spells or the Buffs/Healing Spells, but not all of them. Another thought is that by concentrating on Wis and ignoring Dex, i will be making 2 sacrifices, better AB with Bows (if only slightly) and Improved Precision Shot (which i can't get without a base Dex of 21 or higher). But is Improved Precise Shot actually worth going Dex over Wis?

3)
One thing i'm also considering is More Ranger and less Druid (for Evasion, 3rd Favored Enemy and GTWF (for free) as well as Improved Precise Shot. Though i probably won't be able to get Tempest due to the feat requirements...unless i add in some fighter levels at the end).

4)
Any other advice on how to improve this build are welcome, if anyone wants to fix me up their own for me to consider, that's also welcome