Thanks for the responses everyone. Yeah so far with my experiences, the only things strategic wise for Paladin was
1) not exactly when to use defensive cooldowns, but rather when to save them for big hits
2)cover, I use it sometimes on the other tank
3) kinda provoke for tank swapping. It would be more so if I was having to grab adds that would be very helpful to use provoke, but shouldnt because id need to save it for tank swap.

I mean hollowed ground, provoke, etc.. feels more like a reactionary ability rather than having a strategic choice. It would be fun to have multiple abilities/combos that have different benefits and you gotta choose which one would make that circumstance better for you