Hardly - they're still pretty expensive in terms of mana and they have limited range. The intention is to provide a viable form of AE damage, but they'd have to get a pretty damn intensive buff to be that. Since they're pulsing they are in reality sort of a spell with a really long cast time which furthermore attracts aggro while doing the damage, sort of like a blizzard-type mechanic, but only works close up. This means a tank has to have AE aggro before casting (or the totems will be destroyed), but the buff is very welcome never the less :-D