Alteady practically obsolete by hellkite
Yep. I'm actually thinking Hellkite might even be the best Tinker target.
It's too small and easy to kill.
My rationale is that 1 swing destroying a bunch of permanents is worth being slower by a turn.
Plus being easier to kill is fairly irrelevant because none of them are particularly hard. Of course Inkwell is still strong due to beating Jace, but beyond that he looks pretty strong.