For our group, I personally don't use RS, But for second and fourth conflag, which are the short DPS burst ones. Anyway, when I see the Fireball before the second and fourth Conflag, (usually I'll be at the end of my rotation by then) but I'll stop my rotation and do B3 for UI3, then F3 for AF3, by then the 2nd/4th conflag should have popped I switch and start spamming Fire 1's. If your short DPS then throw in raging strikes.