Paladins should use Hallowed Ground more often in dungeons
You can use Hallowed Ground at least twice in a dungeon for mega pulls and you could gain on some significant healer dps if you do (unless healer refuses to dps). Don't just keep it for emergency, make sure cooldown will reset for a second big pull.
Edit4: striked through the following cause I've read compelling argument against it
(edit2: please don't comment on everything below here without taking the stuff in BOLD into consideration)
Say, you and/or healer are undergeared, you can still do mega pulls with paladin and manage it pretty well by starting with Hallowed Ground and then only if needed requiescat + Clemency, and also low blowing + shield bashing mobs. 2nd and 3th part only if you don't think healer can handle it. You basically have guarantee with Hallowed Ground + rq clemency to not die for 20 seconds.
(Don't start with hallowed ground if there's a WHM to take advantage of stuns)
Edit1: To clarify, I meant the clemency + shield bash only for when you know for sure you are overpulling and probably won't survive even when healer spams heals (bc you and/or healer are undergeared), it is definitely not meant for healer to simply do more dps.
Edit3: Here is a concrete example of a situation wherein I think this method saved me. Take note I didn't played optimally (e.g. oGCD timing). Brandwidth was filled cause I'm no PLD expert, just one of the jobs I was leveling.
https://gfycat.com/largelegalcoypu