My first 50 on homecoming was a necro/poison so I can’t really help you on the thermal part but to be honest with you I’d a different mm primary. As much as I love necromancy it is a much weaker speak overall compared to some of the other mm. No aoe, all melee but boss and servant, boss is more of a cc guy than dmg dealer and the special power that all mm is strong but requires one of your minions to die first to summon. All in all I’d try for a different primary.