After he does supression there will be blue electricity beneath him that will give you a few seconds to get the heck out before it goes off. The closer you are to boss the more damage it does. It can one shot you even in LFR.
A reasonable distance away before it goes off wil lmake sure u never die
The animation for this ability was never on the ground, so I’m not sure what you’re missing. Did you turn your graphics down recently? I did LFR Gallywix 9 times yesterday across alts fishing for the mount and the blue circular lightning animation during the appropriate phase was working without issue.
Considering the floor texture, I imagine it doesn’t take much loss of contrast or particle effects to make it nearly vanish if you’re not looking for it.
My graphics are on the low side, but I still see this mechanic. In the past, disabling projected textures and particle density has made certain mechanics disappear for me, so it may be helpful to check that you have those enabled.