Some one kick me for thinking this idea...

[hu-flung-pu]

Two ideas for level split.

Warforged....

Favored Soul 6/Wizard 14

OR....

Favored Soul 2 /Wizard 18.

16 STR
8 DEX
15 CON
17 INT
6 WIS
10 CHA

You're basically taking the favored soul for the great sword feats, and limited buff casting, as well as wand use.

Wizard Pale Master 2 and lich and maybe wraith form.

Taking Inflict serious wounds as your third level spell means instant healing in undead forms as well as healing of your minions. Enough Wizard levels to land FoD and wail of the banshee reliably. BUT... is the initial benefits of the favored soul worth giving up for the higher level wizard spell slots?

You pump up UMD, and you can even start scrolling higher level divine spells.

[Dark-Star]

I don't think it's worth it. Better to go 8/12 for the div power if anything, or 7 clr/2 evasion /11 wiz. Have penciled out all of those builds and cannot come up with some thing really good.

[Sinni]

Taking Inflict serious wounds as your third level spell means instant healing in undead forms as well as healing of your minions. Enough Wizard levels to land FoD and wail of the banshee reliably.

When you take 6 fvs levels to get inflict serious you only have 14 wiz levels left, which only gives you 7th lvl spells, so you won't be able to even cast wail of the banshee.

[Ultrazen]

The problem with /wiz anything, is less than 18 levels of wiz with heighten = you might as well not even bother to cast any spell with a DC, which makes a lot of what you roll a wiz for useless.

As far as a couple of levels for the buffs/wands, you're much better off taking 2 levels of rogue, getting a butt load more skill points, access to UMD, evasion, etc.

Giving up wiz power, for fairly crappy and common buffs, just doesn't end up being worth what you lose.

One real tangent you might want to consider, is bard, with a few levels of rogue, and one level of sorc (for mana pool), or just one of the many bard multi builds. That will give you access to the buffs/wands you want, without gimping the main focus of your character. A spellslinger bard with evasion sounds almost like what you're trying to do.