Unfortunately that's 24 man raids for you, and Eureka is even worse in that most players seems to be fight over who gets the rez out first to the dead target. Wasting a bit of MP in those raids sometimes cannot be avoided, you could do an alliance wide macro but again it may not work correctly or someone might ignore it/not see it. If nearly 7 players keep trying to jostle for the rezzes then eventually someone needs to use common sense and either just stop and let someone else do it, or say something about it in the party chat. MP management is really something that should be learned while progressing through the game, but I suppose that is a little too optimistic isn't it.