Honestly depends on your target and how many people are on him.
If your target is only going to survive for less than 10 seconds, keeping SR up is probably first prio, then FB is second. I'd only really rip in (random) bgs if it's a healer, or you're completely 1v1 and it's going to tick more than 3-4 times.
(I haven't played Feral since S11 - so this may be completely wrong now, but rip used to have to tick 3-4 times to out damage even a 0 energy Fbite).