Mana-Mage Hierophant (Theorycraft)

Hi! After a saw the new Archmage support i started thinking that indigon maybe back to the menu... So i made a PoB (https://pastebin.com/jdTuAkkv) with what i think maybe a good character.
It's not perfect and it has some insane gear, but not optimal for the build (sorry i am stupid) what you guys think?

1- I took some pathing to go near to the outer jewel slots for the new jewel mechanic in delirium.
2- The build is most focused in scaling mana
3- it's MoM + Low life so it may look cluncky


Reposting the PoB: https://pastebin.com/jdTuAkkv

Grand spectrum no longer grants mana, and using indigon plus archmage will push ur mana cost to rediculous level (>100% mana pool) after 1 or 2 casts.....
You can check my post if you need some idea: https://www.pathofexile.com/forum/view-thread/2805657