I think the most important thing to git-good is to figure out ways to break Action economy. The ability to sustain more buffs or stack more debuffs on an enemy is paramount to punching above your weight class. With Shadow clones and summoning we have the start of a path to breaking the system. The problem with these are they take an action to cast. So when fighting against an S-ranker the goal becomes finding away to survive there initial attack. To solve this we need to look at
@MadScientist idea for action really seals. By developing a seal that can proc other seals in response to a chakra pulse we have the ability to release a devastating counter attack as a supplemental action. We can have multiple airdomes cover us at the same time that flash bangs, earbusters, and pangolin peppers macerators all debuff our opponents.
We already have two seals that open up this tech tree for us. Casino seals are able to take an input and produce an output at a distance. LBF gives us the ability to research seals that interact with other seals. Combine the two to develop ARS plus the chaos suit and we have a devestating seal tech weapon