There's another post in this forum about the lag in the Master Artificer raid when you're breaking the crystals. I experienced this too, but it's manageable IMO, since it's a fairly short duration, and you're just standing and swinging.
My major complaint about this raid is the lag inducing anti-magic field. Don't get me wrong, I like the antimagic field, it adds an interesting element to the raid. The problem is that everytime you enter or exit the field, you lose or gain all of your buffs, and this lags people out like CRAZY. It's like when you get hit by disjunction in epic ADQ, except that it's happening constantly because the range is fairly small, and the Titan moves, so you are constantly moving in and out of it.
This needs to be fixed if people are going to run this raid on a regular basis. I am not sure what causes the lag, is it the graphics associated with turning the icons and visual aspects of the buffs on and off?