I’m not 100% sure incinerate scales with INT (haven’t tested it). It’s a magical attack and it should, but I’m not entirely sure.
Cure surely scales with INT though, scales twice, too. Meaning 1 INT = 2 damage for Cure.
I recommend you focus on either SPR or INT. Don’t do something like half/half on both.
Your skill build looks okay, if you take INT, max Cure. If you take SPR, doesn’t matter if you take Deprotected Zone or Cure (because deprotected zone sucks imo, but ofc it’s better than INT-less Cure). If you go INT, I would take 5 points out of safety zone and max Cure.
If you take INT, don’t take Stone Skin, if you take SPR, max it. If you take INT, use those extra points into exorcise (or something else if you prefer).
I usually don’t even bother getting Monstrance lvl 1. But that’s up to you.
Capella will buff with monstrance regardless if you have it or not.
The rest looks okay. You just might want to rethink that lvl 2 incineration, though. It’s not worth it keeping it only at level 2. Either max or use those points on something else.