I have ran Ultima HM countless times, and I've even achieved victory in a few and have gotten the ring to drop once, but I still find myself having trouble with the 2nd round of magiteck bits occasionally. The problem stems from the fact that, as soon as they spawn, I'm the target. This doesn't always happen though, but when it does either I or the tanks are as good as dead. Even Shroud doesn't seem to have any effect, while the lasers are alive I'm always the target. This makes healing anyone, including myself, impossible outside of that 1 precious Swiftcast I can use because I literally can not stand still for more than 1 second to get a cast off (not even PoM can get a cast time that low).

Of the few victories I do have with this fight, it was always with another WHM healer as the enmity between us is pretty split even and I'm only dodging half the lasers. Every single run I do with a SCH partner, I KNOW I'm going to eat these damn lasers because naturally WHM gather much more enmity than they do. It's in these parties that I constantly find myself dying.

If I stand still just long enough to cast, I am taking damage from half the lasers and die.
If I wait until those lasers cast and sidestep to avoid them to cast, the other half of them kill me (because they never seem to fire in unison, the attacks are always placed EXACTLY far enough apart to prevent me from standing still for more than 1 second).
If I just keep running around like a chicken with its head cut off in order to ensure my own survival, party and tanks don't get heals and tanks end up wiping to that refraction skill, or party wipes to the crashes following immediately after tank purge.

DPS can only kill them so fast as they are pretty spread out. For the entire duration that these things live I just pray no one dies to the boss's AoEs because I literally can do nothing to help until there are few enough bits left to get casts in between the lasers. This is incredibly frustrating because this one mechanic literally just cripples my ability to do my job.

As I've stated before, it's not always an issue. When I'm partied with another WHM, he/she usually draws some of them away, so we essentially split them enough so that we can each manage to dodge them long enough to get some heals out. It's when I'm partied with a SCH that every run ends up with me dying because I'm taking the full brunt of all the enmity, and the lasers target ONLY me the entire time they are alive. Nothing is more frustrating than seeing 6 AoE lines converging on your character every 1-2 seconds and having no way to stop it.

How do you guys get around this mechanic CONSISTENTLY? I know I should expect the DPS to be dodging the things they can, but not being able to throw a single heal out to anyone is really bothering me.