The 4p DR has nothing to do with your stack count. The stacks are only for DPS and movement speed. You gain the full 60% DR while strafing and for 5 seconds afterwards regardless of stack count. You’ll want to make sure you get Wraps of Clarity up right away and start Strafing, but as long as you do that, you have the same mitigation with 1 or 20 stacks.