What's so wrong with Duskblade?!
Sorry, i've been playing one and i'm loving it...
Anyway, that will also depend on the type of character you want to play... If blasting isn't your deal, but you want to use magic, maybe a "martial-debuffer" like the Hexblade, or a sneakier type, like the Beguiler.
I'm not (at all!) an expert min-maxer, but Fighter/Warmage doesn't synergize very well, as CHA is usually a dump stat for the Fighter and the Warmage uses INT for greater damage. You end up with a character needing, at least, 3 good stats to make it work (STR, INT and CHA), considering you need DEX and WIS to make up for light armor AC and weaker saves... well, you get the picture.
If you're going Warmage, a popular combo is Warmage/
Rainbow Servant. I haven't checked it in depth, but at least you end up with needing a single good stat (CHA) and others at more average levels.