eh, i agree about not using enhance for PvP, but the comment on 5v5 arena elemental shammies is more or less false from what i've seen (and i've seen a lot).

once you go oom (which is relatively fast in a 5v5 round where there are reasonably good healers, you are quite frankly shit for DPS. you can hang out by your mana totem and throw a chain lightning or heal out every once in a while, but if you dont manage to nuke one or two of their guys down before you're oom, you have just doomed yourself and completely removed your DPS from the team.