I've been getting Titania a lot in trial roulette lately, and something that's confusing me is why the right to left kill order for the adds has become the norm when it actually puts more stress on the healers/tanks then doing it in the opposite order.
Killing the adds does not stop their AoEs from going off after they become huge, but it does prevent the two tankable adds from auto-attacking, which is fairly significant when considering how hard they hit.