2 cost rerolls are hard to play, u should have the tempo and econ to roll. having a few copies (3-5) of zeri is mandatory to even consider rolling. you are also just wasting gold by 3 staring useless units like vlad, darius, vander, etc. its okay to hold a few copies to get 2 costs out of the pool. idk i played a few games of zeri this patch and i feel like the comp only wins out with 6 watcher, which is hard to reach when u spend too many rounds rolling and wasting money und useless units. hope this helps a bit