If you can get the human paragon (UA), and Rainbow Servant to be text over table (10/10) Even if you can't you can balance the 6/10 with WM levels I'd play something along this:
STR / DEX / CON / INT / WIS / CHA (High)
Human Paragon (HP), Warmage (WM), Paladin (Pal), Rainbow Servant (RS), Risen Martyr (RM)
HP 1/WM 1
Pal 1/HP 2
Pal 2/HP 3
Pal 3/WM 2 - Entry Trick
Pal 4/RS 1
Pal 5/RS 2 - I'd take the Spirit of healing from dungeonscape instead of the mount, 6xCHAx2 healing spirit has basically become my 1/day "heal" spell at the lower levels, and will always be useful. After this point, Its just a matter of finishing Rainbow Servant, I'd leave paladin now too personally....
X8/RS 3-10
a 1 level dip of Prestige Bard would be awesome right here (you can get preform from Human Paragon
), then go into your prc from boed (risen martyr for CHA to AC?)
I'm intentionally delaying Warmage3/6 for eclectic learning on higher level spells.
Without the Human Paragon:
Pal 1-5 /// WM 1-4 + RS 1 - Entry trick.
Without (10/10): Put WM on the other side to balance your caster level loss
Without an early entry trick, WM 6 is necessary unfortunately, ruining the eclectic learnings.
You can use Sorc instead of warmage, however it forces you to pick the spells for spells known, rather than just knowing them. Beguiler and Dread Necro function the same as Warmage also.
What race to use? Changeling or Human... Use the Heighten/Versatile Spellcaster trick for early entry;
Changeling for recaster (Races of Ebberon) after finishing Rainbow Servant.