I found crypts first boss to be nearly impossible with my team. I even went in just after hitting 70 and couldn't do it until I subbed in my paladin to tank.

At that level, I'd suggest looking to some of the world quests. Many of them are quite easy (non-gathering) and have good rewards. You should have no problem with the Ring of Blood for instance. 20 minutes for great rewards and like 70k XP.