If you do not care about damage, take out chaplain, C3 Paladin has a lot more to offer to the party.
Barrier is a REALLY good skill. Conviction is also a Really good buff, it will increase the damage of your party greatly.
Also Bless past 3 is not worth it unless you are going Pardoner. And lvl 3 is due to the talent that adds 100 damage to Bless. Aspersion is the best endgame Priest buff, paired with Stone Skin and Revive, so max it for full potential.
Stone skin is a must, depending on your amount of SPR, get 1-5 points on it.
Smite’s damage is a bit shitty unless you are going with high STR (and still will be) Also the knock back is annoying and your party will ask you to stop using the skill since you keep the mobs spread instead of grouped in one spot.
Build like: this
Sacrament past level 1 also doesn’t have much to offer, the damage difference is hard to notice. Both lvl10 and lvl1 do the same thing, add 1 more hit and that is all you need.