Sleep 1: 30s
Sleep 2: 15s
Sleep 3: 7s
Sleep 4: full resist! /sadface.

Instead...
Sleep 1: 30s
Sleep 2: 15s
Sleep 3: 7s

Let target wake up and come at you.
Fluid aura! Knockback & 5 second stun.
Move away a little. Let target unbind and come at you.

Sleep 4: 30s
Sleep 5: 15s
Sleep 6: 7s
<repeat>

It doesn't take long for the resist effect on Sleep/Repose to wear; Fluid Aura's bind is just about the right duration. But you have to let the Bind effect tick through. (This is a time thing, not a rotate CC thing.)