Heal/Tank Paladin for 4 Caster Groups

[Morganti]

I see people talking about 4 caster groups (4 mages, 4 locks, 3 mages and a lock) with a healer quite a bit, but running dungeons with these groups requires getting a little tricksy (lots of sheep and single target them down, or voidwalker army and deal with the RNG nature of multiple aggro).

This made me think of something I saw in a video for aoe grinding with the pally where the pally basically runs in and consecrates and then just heals himself to hold aggro using consecration aura and spiritual focus to achieve uninterruptible heals. How viable would that be for tanking dungeons I wonder if you were using say a shield spike and maybe the imp damage shield? You could aoe the hell out of trash and the pally just sits there and eats the damage while healing.

Thoughts? Trouble holding aggro? Am I late to this party and everyone already does this and I just don't know?

edit: formatting