Can you provide your ninjas here? .. post screenshots of ninjas you have right now so the community can help you to build team ..

Usually, Roshi is used with watermains + support ninjas like Sakura [Cloak] and Kurenai SB .. If you don't have Han then you can choose to use Fuguki, which is easy to get ninja from GNW Treasure .. Other uses him with Windmain or Earthmain, together with Bee Seven Sword Style and Kushina Red-Hot Blooded Habanero .. But with Hanzo Salamander, the most probable team that you can do that is good for PvPs is having a High-Hit Combo team, you need someone to proc their Combo Chases and also much better if you have KoH summon .. I can't think of any teams as of now with Roshi and Hanzo together, but i hope someone can help you to build one .. Sorry if can't give much help :|