there is a post made by admin where ppl post their configs u can check it out me myself tried someone elses config and its working fine so Ima stick with it unless I find something even better
About the config you can find all of good configs in the forums , Just search for "WSReborn Config" and you will find them all and about the champions, Viego is the most OP jungler with WSReborn , and we have Zed , Ekko Elise and etc for S tier junglers.