Elemental resistance is honestly not that useful, especially with the cooldown and duration of Resist Elements.
Is there a reason for having level 3 Barrier instead of 1 or 5? (it has 100% uptime with 1)
Why Conversion 3? If it’s entirely for fun, I would give it a 1 at most; you can redistribute the rest to Turn Undead.
Smite & Conviction… I’m not sure what you’re going for here. If you want the higher base damage, max out Smite. If you don’t, having it at level 6 will mainly just make it semi-useless eventually when your stats don’t support it. Either keep them at 1 or max them, I would say.
As for Restoration, I personally don’t find it useful enough to justify the points. You have Heal and Mass Heal, I doubt you’ll need passive HP regen.
I don’t have actual experience with taoist, so take the next segment with a pinch of salt.
Taoist has low synergy with Paladin3 (which mainly leans towards physical skills).
3 Disasters seems like a static, weaker version of Resist Elements if that’s what you’re using it for.
Storm Calling has an extremely short duration and it mainly used for its electric damage increase (which you don’t have).
Also, you’re INT-based with a single skill for DPS (that relies on INT) that doesn’t even hit flying until R8?
It’s probably better taking a circle of some other class rather than Priest2.
Even in R8, you’re not going to have anything close to reliable damage with how many INT-based skills you have and their cooldowns. If you intend to support most of the time, it may be best choosing a different build capable of doing so.