Oath of the Watcher Paladin Build

[KorvinStarmast]

What I did with mine was go for Medium Armor Master feat,
vHuman,
Dex build. I explicitly pumped Charisma on ASIs to get to (in the end) 20. I wanted my aura and my spell save DCs to be the best I could.
Also ended up with Telekinetic feat, which ended up yielding misty step.
This allowed me to pursue some foes or reposition.

I ended up using counterspell quite a bit, rather than smite, once I hit level 9. But that had to do with our party composition, somewhat.

Character retired at 17. Greater Steed was a Griffon.

Never raised DEX above 16. (Didn't need to). I did boost CON to 16 later on.
With defensive fighting style I had 21 AC in half plate and shield. And, I was not a liability as regards stealth. I'll go and dig up the final build and post it here when I get to it.

If you get a free feet, and you are also vHuman, see if the DM will let you start with both. If not, go normal human and add the feat. you'll get a few more stat boosts that won't hurt.

Later in the game we earned a boon, which got me a feat: Metallic Dragon's gift.
Recommend it if you can get it. Might be worth getting at level 12 and letting Cha stay at 18; the defensive boost came in handy many times.