Why so obsessed with weaving?
Broil is 170 potency. Ruin is 80 potency. How much time are you gaining by weaving a non GCD skill/spell or buff? At most like 0.5 seconds. That's 1/5 time of an entire 2.5 seconds cast. Let's assume for a moment though, that weaving a non GCD skill/spell or buff saves you an entire second, you are still not even saving the time of half of a cast. Why on earth would you prioritize doing an 80 potency spell in 1.5/2 seconds over a 170 potency one in 2.5 seconds?