Well, most agree that Weird Words is unbalanced, at least as most have been interpreting it.
Fun times! I play a PVP competition every year at GenCon and this year I played a Sound Striker Bard using the "all on one" interpretation as set out by the GM of the competition. I won.I never took a single point of damage and never failed a save (AC 40 Touch AC 34, saves Fort +28, Ref +38, Will +33) due to Cha to AC/CMD/all saves (Nerid's Grace/Bestow Grace.)
From what I could tell of the other 11 entrances, the only one that out did me in damage is a Named Bullet Gunslinger and that was only by a small margin.
10x 1d8+18 attacks is devastation. Strips 10 mirror images quickly and outright kills pretty much every person who entered whether or not they made their save. For reference, I missed only one attack when attacking. Touch AC is hard to optimize and I had +18 to hit.
If there was any doubt the ability needs changed, then I can demonstrate to you how there should be. ;-)