StreamOfTheSky
Adventurer
Think very hard as to why allowing essentially unlimited spells or powers per day might be a bad thing considering the power of the spells and powers available.
..."And that is why I ban the Warlock in my games."

I think arcane swordsage could work, if it was fleshed out better. I mean, Duskblade is considered fine, and lots of other gish prestige classes are fine. If it simply got a bunch of spells as supernatural abilities (following how all maneuvers are Ex or Su), used the same recovery mechanics, etc... It'd only be as broken as the spell list it could choose from. The entry lists certain schools that it should be mainly focused around. It also says most should be personal or touch range. So, as a rough start...available spells are drawn from the sorc/wiz list and in all cases except for x schools of magic (probably evocation and 1-3 others, maybe in some cases only a subschool like conj. [summoning]), only personal or melee touch spells are allowed. I don't see why it couldn't be balanced, at least compared to a full caster or caster/warrior/PrC hybrid.