1. That lineup's pretty good, but if you want damage over survivablity go for wind main.

2. I'd take the killing intent talent due to this lineup being a bit blizy, and it gives the ability for shisui to reset his ability.

3. Save up or go for power, that team you listed is still viable and if your team is still viable, there's no need going for a different team. Only go for new ninjas once your old ninjas are no longer viable.

mystery reset with dance of impetus.