Reverse Blood Magic Support Gem?

"OP", but its better to stack 7 auras, and go for one skill. Min / Maxing you know :). Auras are so good that you naturally want them all or most of them. And considering taking mana instead of hp is kinda obvious and kinda has nothing to do with that mana needs a overhaul in this case.

I dont say mana dosnt need a overhaul, but in this disscusion it dosnt have anything to do with mana, Its more a survivablity issue really. I rather have 4k+ hp then 200 hp. And considering this is kinda a must have if you play solo in late game (85+) it would be kinda hard for GGG to nerf it. I mean the surviability you gain and damage is very hard to get from anything else in the game. The 3 passives you spend makes you alot more tankie and makes you do alot more damage.