VIT is important and you'll get more as you level up, but points of VIT you allocate are insigificant. If you allocate 15 points of VIT at level 37, you will gain maybe 50 HP. It's certainly not as useful as MND.

There are a few tricks to stay safe, which are common sense, but I'll say it nonetheless, as I saw too many players not knowing or seeming to forget about it during the heat of fights. You are a Range player and your range of healing is huge and you should try to stay as far as you can when healing. If, unfortunately, you get some adds over you (it happens - even to the best healers), the thing NOT to do is to run farther away. The enemies will eventually catch you anyway, whether you sprint or not, or worse, you could be dragging more. Instead, run to the tank. That will make the enemy be in range for the tank's provoke/flash so he can take back on himself.

That said, Bray is one of the first real check-points in the game and it's normal you find it "heavy", responsibility and healing-wise. There has been a lot of threads about this dungeon alone in this "Healers" subforum, and you might want to have a look, the infos they contain are golden for whoever is a healer, at ALL levels.

Don't be disheartened by how some players react to your healing In-Game. They also share their loots of responsibility. When they see you are having a hard time, they should :
- NOT pull too many at once
- Dodge the avoidable damages/aoes more.
- Use their buffs with better timing.

And even more importantly, discuss. When you have a peaceful moment for that, tell them if you are having issues about anything (mana pool, not managing to switch your targets to be healed fast-enough, or one of the above). They will hopefuly understand your point and make sure it won't happen again/ dodge more/ slow down the the run a bit.

You'll often see remarks about "it's a healer's job to heal, if he doesn't then he's the one to blame" blabla. It's also the other player's job not to make your job more difficult than it should.