I've turned off the flow on scars of dust. In BOTS it works the way it should. In pve it works the way it should but in arena it still keeps the flow animation. We've gone through 3 patches and the bug is still there.

Try as Fight Start in arena, click button with sword next to the skills. I dont know od its works but someone suggested me to try it. Besides in my opinion silk of the Dusk is shit skill, used in wrong moment makes You easy target.

Try this combo.