That's what happens, if you introduce a template, which excels at tanking because of leeching and also excels at damage dealing because of slayers, AI, etc, which in addition contributes to leeching. So the common denominator is, drum roll, leeching.Time to kill the Sampire. Its gone on too long of single characters being able to solo almost everything in the game with ease.
In an ideal world, everything would be balanced in a rock-paper-scissors-manner: Healers, Tanks, Damage dealers. A character should only be able to specialize and excel in one of those three or go the jack of all trades route and not excel in any. To make that happen, we would need a complete combat overhaul, like starting from scratch... as much as I would like that, not going to happen....