Working out possible options for my 2nd TR, and I'm beginning to like the look of this Tempest/Frenzied Berserker build, but I'm having some issues with it.

Code:
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Level 20 True Neutral Half-Orc Male
(6 Barbarian \ 2 Rogue \ 12 Ranger) 
Hit Points: 280
Spell Points: 140 
BAB: 19\19\24\29\29
Fortitude: 17
Reflex: 15
Will: 5

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(36 Point)       (Level 1)             (Level 20)
Strength             20                    29
Dexterity            12                    15
Constitution         16                    18
Intelligence         12                    14
Wisdom                8                     8
Charisma              6                     6

Tomes Used
+1 Tome of Dexterity used at level 3
+2 Tome of Strength used at level 7
+2 Tome of Intelligence used at level 7

                  Starting          Feat/Enhancement
                 Base Skills         Modified Skills
Skills           (Level 1)            (Level 20)
Balance               5                     6
Bluff                -2                    -2
Concentration         3                     4
Diplomacy            -2                    -2
Disable Device        5                    25
Haggle                2                     2
Heal                 -1                    -1
Hide                  1                     2
Intimidate           -2                    -2
Jump                  9                    13
Listen               -1                    -1
Move Silently         1                     2
Open Lock             5                    21
Perform              n/a                   n/a
Repair                1                     2
Search                5                    25
Spot                  3                    22
Swim                  8                    12
Tumble                2                     3
Use Magic Device      2                    21

Level 1 (Rogue)
Feat: (Past Life) Past Life: Cleric
Feat: (Past Life) Past Life: Monk
Feat: (Selected) Power Attack


Level 2 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Undead


Level 3 (Ranger)
Feat: (Selected) Cleave


Level 4 (Ranger)
Ability Raise: STR


Level 5 (Ranger)


Level 6 (Barbarian)
Feat: (Selected) Dodge


Level 7 (Barbarian)


Level 8 (Ranger)
Ability Raise: STR
Feat: (Favored Enemy) Favored Enemy: Evil Outsider


Level 9 (Ranger)
Feat: (Selected) Mobility


Level 10 (Barbarian)


Level 11 (Barbarian)


Level 12 (Ranger)
Ability Raise: STR
Feat: (Selected) Spring Attack


Level 13 (Barbarian)


Level 14 (Barbarian)


Level 15 (Ranger)
Feat: (Selected) Improved Critical: Slashing Weapons


Level 16 (Ranger)
Ability Raise: STR


Level 17 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Construct


Level 18 (Ranger)
Feat: (Selected) Stunning Blow


Level 19 (Ranger)


Level 20 (Rogue)
Ability Raise: STR
Enhancement: Barbarian Damage Boost I
Enhancement: Barbarian Damage Boost II
Enhancement: Rogue Haste Boost I
Enhancement: Ranger Skill Boost I
Enhancement: Ranger Skill Boost II
Enhancement: Ranger Sprint Boost I
Enhancement: Barbarian Extend Rage I
Enhancement: Barbarian Extend Rage II
Enhancement: Barbarian Extra Rage I
Enhancement: Barbarian Extra Rage II
Enhancement: Barbarian Hardy Rage I
Enhancement: Barbarian Hardy Rage II
Enhancement: Barbarian Power Attack I
Enhancement: Barbarian Power Attack II
Enhancement: Barbarian Power Rage I
Enhancement: Barbarian Power Rage II
Enhancement: Barbarian Frenzied Berserker I
Enhancement: Orcish Fury I
Enhancement: Orcish Power Attack I
Enhancement: Orcish Power Attack II
Enhancement: Orcish Power Attack III
Enhancement: Orcish Power Rage I
Enhancement: Orcish Strength I
Enhancement: Orcish Strength II
Enhancement: Ranger Favored Attack I
Enhancement: Ranger Favored Attack II
Enhancement: Ranger Favored Damage I
Enhancement: Ranger Favored Damage II
Enhancement: Ranger Favored Damage III
Enhancement: Ranger Favored Resistance I
Enhancement: Ranger Favored Resistance II
Enhancement: Ranger Tempest I
Enhancement: Ranger Tempest II
Enhancement: Rogue Sneak Attack Accuracy I
Enhancement: Rogue Sneak Attack Training I
Enhancement: Barbarian Constitution I
Enhancement: Barbarian Constitution II
Enhancement: Ranger Dexterity I
Enhancement: Ranger Dexterity II
Enhancement: Barbarian Improved Trap Sense I
Enhancement: Barbarian Improved Trap Sense II
Enhancement: Rogue Wand and Scroll Mastery I
Tempest attack speed weapons with Frenzy's viciousness and 40 STR before equipment or raid buffs is applied (29 + 7Rage + 2Frenzy + 2Ram's Might), Power attack giving +10 damage, Stunning blow with a very solid DC, level 12 Ranger spells for utility, trapmonkey, and a basic UMD.

Some obvious problems though: Feat starvation. I can't afford Toughness without giving up Stunning blow or improved critical, all the other feats are requirements for the prestige enhancements, which leaves me at horrible hp for the self-damage I'll be taking. I'll be using Scimitars as well, since there's certainly no room for Kopeshes in the current build.

So I come to the internet for help. Is there any way to change things to fix this? Can the hp weakness be compensated for with equipment? (When raged, I do have 340 hp pre-equipment...) How much am I hurting myself abandoning the kopesh as opposed to, say, IC:Slashing?

Worst comes to worst, I can salvage the build by sacrificing UMD, trapmonkey, 1d6+3 SA, and skills in general and replacing the 2 Rogue levels with 2 Fighter levels, getting the oh so useful +2 feats.