So I don't usually care much for balance in a singleplayer title. Quite the opposite, I believe that finding combinations and stronger skills that work well is part of the experience, but there is a difference between stronger and broken.
The Bone Widow is such a case, it costs just 3 action points, requires no source, but is an absolute tank, is incredibely mobile thanks to its burrow/teleport ability and deals an unreal amount of damage. At level 12 my bone widow has 2704 hp and 404 physical armor and deals 260 physical damage. Compare that to an incarnate champion, who has 660 hp and 202 phys/magic armor, who deals 160 damage.
Nothing else in the game deals this much damage, is this tanky and mobile, there is literally no reason to use something else, it is hilariously overpowered.
