For haat forget tenacity, b2 only ability block if you are buffed, never use the retribution special, go all the way with last special for protection recover. If CD go basic attack.
For mods go crit damage set if possible, speed over 200. Protection cross for haat, potency for arena. He stuns if full health, so you want potency for arena. Secondary try find some protection and CRIT chance. Good luck soloing p1. FYI use airplane mode if you can't escape battle.