Archer/Hunter Help Looking To Improve Build!

This build I probably made years ago, and its main focus was mana regen/spell spamming. For reference, I can throw out around 8 arrow bombs before I have to chill out for like 2 seconds to regain full mana. Although for that it still holds up, I'm asking for help in retro-fitting it to have good spell damage/sustainability by myself (I literally cannot beat Aledar in A Hunter's Calling lmao).

Here is the build

 

it's not very smart to get 18 mana regen and spam one spell.
instead you could reduce spell costs with cycling different spells.
so you can make do with less mana and instead get some more damage or whatever useful in return.

some decent spell builds for archer...

gale's force
https://wynndata.tk/s/g8f27e

cluster
https://wynndata.tk/s/sny2dv

orange lily
https://wynndata.tk/s/uj9t2q

 

If you don't have ornate on the Olily build you can use Elder Oak Roots