tri-caster 3.5

[sym]

ive been out of the game for a while now and im starting to back into it. im playing a campaign that runs from 1-20 and everyone in the group is playing some form of mundane character and ive decided to play an old tri-caster build that i have and i would like to get a little feedback on what feats would be good and if there's any better alternates to what i have. at level 17 i get 9th level arcane, 20 is 9th level divine, and at 20 i get 7th level psionic. the build is:

lesser aasimar

1 savage bard (iron will)
2 ardent
3 ardent (?)
4 ardent
5 ardent
6 ur-priest (malign spell focus)
7 ur-priest
8 psychic thurge
9 psychic thurge (alternate source spell)
10 psychic thurge
11 sublime chord
12 mystic thurge (?)
13 mystic thurge
14 mystic thurge
15 cerebremancer (?)
16 cerebremancer
17 cerebremancer
18 cerebremancer (?)
19 cerebremancer
20 psychic thurge

the last few levels are not locked in by any means. and i have yet to lock in the ideals for the ardent.

[Flickerdart]

Theurge builds generally hurt a lot in the early levels. Since you're starting at level 1, it may be better to stick with something that's stronger throughout.

You definitely want Practiced Manifester (Ardent) on there as early as possible.

[Endarire]

Alternatively, Wizard5/Mindbender1/Ur-Priest2/Mystic Theurge8/WizardCasting4 gets you a similar result with less hassle. Or just go full Wizard/Incantatrix.