As for cantrips, I mostly wanted to keep things simple and reflective of the Four Elements sub class. The “default” elemental ability just feels like a cantrip to me (a la Prestidigitation) so i thought a cantrip option (but combat) would be fair and occasionally useful. I didn’t want to load up just to prevent this from treading too heavily into Cleric space. I want to keep the martial arts feel as much as possible.

As for the L6 ability, I was feeling a Zealot vibe when I wrote that, but it could be optional I suppose. I wanted to encourage the player to lean into a holy-light/holy-darkness element there, but it isn’t really necessary :-).