I am keen to get rolling with a pally healer and 4x DK for DPS. I am interested in both PVP and PVE and figured this combination would let me do that.

Until I am well geared, I can use dual spec and let the DKs go as Blood tanks, but I would rather try to run all 4 as Frost and use the Pally to heal them.

Question is how do you do 5 man runs and heroics without a real tank? Don't the bosses cleave and destroy those in the melee range?

Secondly, would a pally or druid be a better healer for Pve? I thought with all the HOT of a druid, they might be able to keep the 4 DPS all up and running easier than a pally. What experiences do you other boxers have?