Hmm i will rewrite sephice comment so it's more userfriendly :P

EotS Strat:

1 Boxer on Drenai, one boxer on Mage and some healers to support them. The rest of the team tapps your base and trys to defend against the few enemys trying to get the flag. This strat worked quite well on the last EotS WE. We even got some premades with this tactics, but i think we have to change this strat.

In Alterac, zerging is the best way to win. Just tap the first two towers, defend your own towers and zerg down the alliance.

On IoC we did not have much time to test, but this week is an IoC Weekend, so we will try out some tacticts there. Zerg or def works both. Most of the time we push to the docs, because the hangar is not so boxerfriendly :P

My two cents:

I think for 15 man Bg's you should not have more than one boxer maybe two. But that is the maximum. Otherwise you will hinder your team to much, because most of the team is at the same place. We saw that on the EotS we. Everytime we did not split, we had problems.