Just a recommendation, do not use him as a tank unless flanked by heroes immune to Insanity. I fought this setup in war recently (not Ancient Terror War). First time Hunter fired but did not manage to kill anybody from my team. Second time his Insanity procced and he killed himself, as he was, being a tank, weakened enough. This of course gave 100 Insanity to flanks, one of which, Verus, then put the rest of team near the grave (a little push was required, but still).
The best position for him is wing, definitely. Even if he kills himself only one hero goes insane, and that spot can be filled by someone resisting Insanity.