Need help. Lightning Arrow build not working.

I am new to the game and found this build very fun to play. I went for an upgrade today, but everything is messed up, and my DPS has dropped from 30k to 20k. I don't have any mana left if I use Grace and Anger together. Could someone please suggest a build or help me correct it
https://pobb.in/1N-zCosuJXus

I'm in mobile right now but crafting " Non-chanelling skills have -7 to mana costs" would be a start. It can also be crafted on a rare amulet.

Another option than can be used with or w/o the craft is to find mana reservation efficiency. It can be found on mana masteries on the tree and on base and abyss jewels as an explicit mod and as a corruption implicit. You could also add a small cluster jewel that has mana reservation efficiency and roll it to have a notable that gives 50% increased mana reservation efficiency for grace and for anger. Only one can be rolled on each cluster tho. You can go to craftofexile.com to see all the mods that can be rolled on gear and jewels. Hope that helps a little.