It'll always be a green swirly aura predict that in the fight, get used to it then: Grit > Hard Slash > Provoke > Spinning Slash > Power Slash. You'll always have perfect tank swaps doing this unless your co tank is doing a Butchers Block/ Rage of Halone then you need to tell em to just pop CDs and auto attack. Another thing is Soph is rooted to the ground for 3-5 secs after that so you and your co tank can kite for a sec so you won't die to the auto attack after.