How to fight him without constant parries or out dpsing him…
How to Beat the Time Keeper
It can be a bit tricky with melee as you need to time your dodges well.
With ranged you have a lot more room to dodge and deal damage in between.
Of course it’s not limited to weapons, powers (like grenades) and traps work fairly well too.
But yeah, parries makes that boss fairly easy, and he is a pretty good place to learn how to parry too.