#6 (continued). If we venture into the murky area of partially-charged magic items, consider a half-fiend half-gray elf Warmage 1 with a +2 headband of intellect and a partially charged staff of empowered disintegrate or staff of repeat spell disintegrate.
At 32-point buy, the character could look as follows: Str 12 (8 +4 half-fiend), Dex 16 (12 +4 half-fiend), Con 12 (12 +2 half-fiend, -2 gray elf), Int 26 (18 +4 half-fiend, +2 gray elf, +2 enhancement), Wis 10, Cha 16 (14 +2 half-fiend). A headband of intellect costs 4000 gp, and a staff of empowered disintegrate crafted at caster level 20 with one charge remaining costs 8 x 20 x 750 / 50 = 2400 gp. A staff of repeat spell disintegrate crafted at caster level 20 costs 9 x 20 x 750 / 50 = 2700 gp. If he wants, he can also afford a potion of fox's cunning, which increases his Intelligence to 28.
If he uses a staff, he gets to add his Intelligence bonus to damage because of his Warmage Edge. Without the effects of the potion, he deals a maximum of (40 x 6 + 8) x 1.5 x 2 = 744 points of damage with the staff of empowered disintegrate and (40 x 6 +8) x 2 x 2 = 992 points of damage over two rounds with the staff of repeat spell disintegrate. The potion increases the maximum damage to 746 and 996 respectively (the odd point of damage gets rounded down by empower in the first instance).
EDIT: Oops, I forgot that a warmage only gets to add his warmage edge once per casting. This will affect the maximum damage when he uses a staff of repeat spell disintegrate as he will not get his warmage edge damage bonus in the second round. This reduces the maximum damage by 16 points in the potion-less scenario and 18 points in the potion scenario for a total of 976 and 978 respectively.