Are you magatamas at level 4 all of them?
Are your equipments strengthened to at least lv45-50?
Are your Equipments refined to at least level 3?
Is your battle armor at least level 6; Rank 1-2?
Are your main group skills (Life, Attack, Defense, Ninjutsu) at level 15-20 at least?
Are your main characters awakened, cultivated to the max?
Are you using your Ninja Tools from the Team Instances? Are they leveled up?

Review these questions and get to work.

Also, below your stamina bar there is a Power Up *on. You c*e that to guide yourself