I've had much the same problem(s) as others here, chief among them casting the spell in a group of mobs only to see a significant portion of them suffer no effect at all (interestingly, a Sorc friend of mine is having the same issue with his DI Energy Burst- mobs aren't saving and taking half damage, they're not taking any damage at all, and that with no "Evade" message above their heads).

I think that most Pale Masters came to accept, albeit reluctantly, that Wail with the short timer it once had was overpowered, so we accepted, again reluctantly, the timer being lengthened. But now to have mobs being randomly able to just totally ignore what is, as has been pointed out, our bread-and-butter spell isn't acceptable.