I've seen tanks go down so quickly in A2 normal. Even if I pull out everything. Synergy, Aspected Benefic, Lightspeed Benefic 2 spam, along with co-healer heals.. and it still wasn't enough. Not only would their HP still be dropping fast, but we'd have usually pulled hate on one or 2 things.

In one group, we wiped 3 times in the same spot. A bard told them to equip VIT gear. When they did, the co-healer and I still had to spam heal a little, but we did finally win in that attempt.

It's much easier to tell the tank to equip some VIT accessories than it is to teach them when and where to use their cooldowns.