Make sure you have righteous defense up, have retribution aura on, and use blessing sanctuary. Give it 5-10 sec or so after the pull, and ease into the DPS.

I also spam Holy Shield, but I only use rank 1 consecration just for mana purposes. An alternative that I use is put blessing of wisdom on myself and use max rank cons, but don't spam HS as much. Just depends on what I'm trying to do.

If you do all this, you shouldn't have many agro problems. Still, Omen is nice to make sure since you don't always know how many crits a slave is getting.