Hello -- I'm not sure if you're still looking for a Rival Wings CWLS/group, but there is a Discord for organizing Rival Wings games and someone there should also be able to invite you to a CWLS on Primal DC for it, if you're interested still: https://discordapp.com/invite/WYMpfYp

I'm not sure how active Rival Wings is at the moment but I know the folks there make an effort to queue for it to make games happen. Good luck!