Yes that's the benefit of doing double eye in zerk. If you use potion right after the last eye before zerk, your fracture will get the effect too. I don't have math to support which is better, but it's trading fracture boosted by IR + 3 abandon + potion vs 20 potency from block combo boosted by potion and IR with fracture only boosted by 5 abandon.
One thing I considered was that when you have high enough sks (I don't know how much) you can still do zerk > block combo > frac > eye combo without dropping eye debuff. Maybe I'll try to experiment a bit with higher sks gears later. This is basically looking for min sks to fit in 6 gcds between every eye combo without dropping eye.
