I also get discomfort from Disruption Arrow and I run the all archer teams weekly and it's sad that people can't enjoy this themed events due to a graphics issue. I do hope some devs could look into this matter. I am not sure how it should be changed but perhaps the rate of pulses could be lowered or increased, as it probably that causes the problems people are having. Perhaps changing it to one initial bright flash, like Flash Arrow, and then after that only some audio pings showing it still active.
Regards.
Crim Fletch - TWANG (The Wonderful Archers Network Group)