We are in a similar issue, had 6 people quit in 5 days for unrelated reasons (drama, grad students, just bored of wow, etc) and we’re rebuilding for season 2. If your willing to xfer servers (for mythic prog, can just community invite for heroic) too your welcome. Only big issue is the times might not line up great, which if not, fair enough!
TL;DR: We raid Tue/Wed 7:30-10:00(ish) EST. Were on Dalaran, do mid mythic prog (and knock out AOTC) and we need ranged DPS!
If you want more details or have any questions you can hit up our guild spam here.