Cho Gall Buff/Rework

Cho gall needs immunity to percent dmg or at least spell armor included with regular armor. Hp needs to be increased due to being two heroes. Immunity to CC or 50% cc reduction. Talents of cho and gall need to be reworked a bit since cho gall does requires more sustain when playing against cho gall counters such as q heals and molten block may be necessary. Maybe gall can have twilights veil (the armor talent to help cho change), and cho having molten block. This might make cho gall op, but these are some changes that can be taken apart or only implemented by chosen pieces.