Most things covered already, but I didn't see a mention of communication yet. By telling people, especially the other tank, when Provoke is happening you get at least a chance of them knowing to back off for a few secs.

This can be a macro that puts something in /party chat at same time as Provoke, or something you say on voice chat, or both. There's a reason every successful endgame group uses voice chat, and this is part of it.