A lot of things are diferent when I was checking for wizard builds I've played wizard once when Lich was available on lvl 12 and not 18 and stayed away from the game for almost a year though it's the 1st time in 3 years that I post something here.
I would appreciate if someone could give me some advice.

1st life 32 points
STR 8
DEX 8
CON 18
INT 18
WIS 8
CHA 8

Level 1 (Wizard)
Feat: (Human Bonus) Mental Toughness
Feat: (Wizard Bonus) Empower Spell
Feat: (Selected) Toughness

Level 3 (Wizard)
Feat: (Selected) Insightful Reflexes

Level 5 (Wizard)
Feat: (Wizard Bonus) Maximize Spell

Level 6 (Wizard)
Feat: (Selected) Spell Focus: Necromancy

Level 9 (Wizard)
Feat: (Selected) Spell Penetration

Level 10 (Wizard)
Feat: (Wizard Bonus) Heighten Spell

Level 12 (Wizard)
Feat: (Selected) Greater Spell Focus: Necromancy

Level 15 (Wizard)
Feat: (Selected) Greater Spell Penetration
Feat: (Wizard Bonus) Improved Mental Toughness?

Level 18 (Wizard)
Feat: (Selected) Shield Mastery?

Level 20 (Wizard)
Feat: (Wizard Bonus) Quicken Spell??

Well, I think those are must have Mental Toughness, Empower Spell, Toughness, Insightful Reflexes, Maximize Spell, Spell Focus: Necromancy, Spell Penetration, Heighten Spell, Greater Spell Focus: Necromancy, Greater Spell Penetration.

I read on some threads that Mental Toughness would be just to make Wraith form available and then ditch it after getting Lich form but why should I ditch Mental Toughness? I already got all wizard bonus feats execept for the useless ones like Eschew Materials and I'm not a fan of a secondary spell focus plus it's a 1st life so I don't really have anything better to Mental Toughnessal for though a +1 DC for enchantment would be nice but for that I would simply drop Improved Mental Toughness instead since I just got it for really not having anything else to get.

Some people said that Shild Mastery would be reduce the icoming damage but I think casters should being hit in the 1st place plus a Shiel Mastery is just usefull if I use a shield what would give me spell failure chance and I don't like it. So please if someone can explain to me why a wizard should get this feat even if it will give spell failure chage?

About Quicken it's more for testing really, I never used it on my old wizard and never missed not having it but there were a lot of changes on game on the time I was away so maybe I should give it a tray.

I would like some advice on spells aswell, fire spells seems to have being weakened but still word good on undead. Acid sounds nice but there aren't many spells so I'm not sure what to do with acid just repeatedly cast melf's, acid blasd and acid rain? Eletricity since to have some good aoe spells but then again I'm not familiar with eletric spells. Ice still the heaviest dps as it was before and I plan to swamp my main focus to ice on higher lvls but what would be best for fast leveling?

Thanks in advance.