In general, what combat-oriented feats should gishes be looking at?

[covariant]

Are there any good feats for the warblade side of a gish that have very few requirements, and are useful at higher levels 15-20? I'm looking at Robilar's Gambit for the moment, but what else is there?

Knowledge devotion and other such things are covered. I'm looking for purely combat upper-level feats with very few requirements.

[DeAnno]

If you can't afford all the prereqs for Pierce Magical Concealment (CA), Blade of Force (CM) isn't bad. Mostly depends on how optimized your build is with regards to swifts though.