We should still test how high the allowable HP for the class is. I use the class, and imo, with all his skills, it should still be at least lower or on par with wizard hp(which is another one that needs hp boosts). It will be hard to balance the hp to fit both events and normal pvp, so that should not be the basis.
A bit of an increase would really be good, but needs testing. SL is a glass cannon anyway.