This team isnt meant to achieve its chase. Its all around counter to almost every other team due to: buff disperse, barrier destruction, 2 scaling characters, 2 healers and 2 types of debuff. In addition to that all 4 units benefit from healing tips and team basically autowins longer battles because of how poison dmg works. If you want to achieve 30hit chase, you need to substitute 1 ninja (han in most of the cases) for either bee(his double + mains 10hit chase and koh, add roshis mystery if that wasnt enough) or sage naruto but then this team is significantly weaker when facing blitz or any kind of buff teams. This team is designed to wear enemy team out and outsustain them, rather than burst them using hard hitting roshi's chase.

Let's not forget, that there are different rules for both arena and normal pvp. Example:

As much as immortal teams were a problem in pvp, they were never as strong in arena because arena uses only base stats- thus ability to heal and all kind of defenses are significantly lower.

Same applies to han-roshi-sailor, it works better outside of the arena.