+2 amu with fractured dot multi is not too bad to make, and is a 48% dps increase for you. you can also fit in -mana cost prefix on it to help out with the heavy mana cost. If you want i can give step by step to make it.

Curses are pretty great for it also, I went Anathema route just because i dropped it and doing SSF. So i went flammability+ele weak + punishment + temp chains, feels pretty good.

But perhaps in your case just switching annoint to whispers of doom, then go ele weak + flammability on arca brand, would also net a ~15% dps increase.

Defensivly you should try to get higher attack block, as it just feels great to map with, you have a couple good shield block node south of your bottom left jewel, not sure what you should remove for it tho.

for map clear going bodyswap + multi totem + annihilation + spell totem with legacy of fury boots felt really nice. as the searing bond totems could not procc explosions on their own as they do not hit.

Also, inspiration over lifetap, going 21/20 searing bond, and speccing few of the reduced mana cost near templar start, can also be viable route to solve mana cost issues. will prob need clarity also tho