I'd actually love to see the math on that since I'm mainly going under assumptions. My thought process was that I had a 5 Abandon + IR + Pot buffed Fracture which is clipped at 10s-ish by a Berserk + 5 Abandon Fracture. If I moved Fracture ahead after the 2x FCs (or in-between them for the 5 Abandon bonus) then I'd only get the 1 buffed Fracture. There might be something really obvious I'm missing, the former just seemed better when I was testing out different things.