I'd say get as far as you can in the event. If you're getting 528 drops and 4 rare chests out of the stage 8 then your teams are strong enough and don't worry about that part of it. Getting 3 runs of the bonus stage is pretty tight and I can't do it. I am content with 2. I'm about 2/3 of the way through reset 7 so it will be a push for me to get all the jewelry but I'll give it a go.