I'm pretty sure improved uncanny does null the +2 flank Bonus. That aside I'm going to be out of town for a few days, just a heads up. If Ritas turn rolls around again shes going to cast resist acid (30) on herself and act as a big obtuse un-killable pain in the ass with reach while her elementals kick the shit out things. they like to cleave when they can't full attack and have improved bull rush for some goofy re-positioning shenanigans if need be.