So my group tried an interesting strategy last night for our Durumu (normal) attempts: We let the bear tank solo tank him and I go Ret for extra DPS, with tossing the occasional Protection on him to bubble stacks (this is mostly because he is geared to the teeth and was doing top DPS at 150k last night to my 80k or thereabouts as Prot [however he always tanks bosses first so he gets a ton of vengeance buildup, even if I end up tanking like on Tortos he pulls first and lets me taunt later so he builds vengeance, and he's at something like 43% crit], so it's better for me to go DPS and him to stay tank than vice versa). It seemed to work well except for one part: I still stand with him in the yellow beams like I did when I was tanking him, and they HURT, bad. My health drops like a stone and I need to sometimes use HP on Word of Glory instead of Templar's Verdict or Inq which naturally hurts my DPS, but dead DPS do 0 DPS and all that.
Basically should I just tell my healers to be on the ball with heals, or is there more I can do to help out? I already pop Devo Aura when the beams come out, and I run unglyphed DP and use that typically when yellow crosses into red and/or blue, but it doesn't seem to be enough and many times I'll be near death just from the ticking damage from yellow; typically I end up having to use LoH to save myself because I'm at like 5% health or something like that. I use Sacred Shield during this time as well but I'm debating trying Selfless Healer so I can instant-cast FoL on myself for heals. I haven't done this fight as Ret (we were just trying the strat to see if it'd work on our last few attempts) before.
Any suggestions? Our healers are a Disc Priest, Holy Pally and Resto Druid; I think we have issues with them keeping heals on everyone especially if one of them is unlucky enough to get targeted on the other side of the room with the blue beam so they can't move.