Currently nothing, planning to have another go at grinding once I have more free time (matter of days as of now).
There isn't really much to it besides being vaguely on the left-right-left-right sides of the screen, and moving to the left-right-left-right.
I do hope that it is the case and that the pattern is static - at the moment, reaction-dodging is out of the question, because from my perspective that godforsaken pattern is both meant to screw with your eyes to slow your reaction time
and wall and kill you then (mostly on the final slide of a wave, with those almost-horizontal walls), which coupled with the drop penalty is just cruel - I capture it maybe 1 in 5 times, tops. Hence my hope that I find some foolproof path through it via analysis *or* just find a patch and ram my head against it until I'll be able to read and dodge via sheer muscle memory.
Well, sorry for derailing this thread into spell card help.