Young Star
Grandmaster
I think a really easy way to fix the downside of the relic is to have it return you back to the tile you started at when it goes off.Phase shift is possibly the most underrated relic on the zerker. If you learn how to play with it it is insanely powerful. Combine with tread and ds and its sick. I dont think anything should be changed. Just adapt the play style or dont put the relic on.
That being said, the only good thing about zerker for archery is double strike and poison. I would not recommend any zerker archers when a close combat dexer is way more effective.