I think it should be a static 180 seconds for both players, and when the player makes the move his timer will raise by 20 seconds, never
extrapolating 180 seconds. It ll refrain people from time stalling and benefit the faster people. This kind of strategy is used in Duel Links game.
It has to be adjusted do Pokemon Revolution reality. It could, after 5 min battle, decrease from 20 seconds to 10 seconds.
att.
José Raimundo Fernandes Filho
Web Developer