Vault of glass is where the real raid is! It's a blast your first few runs and really satisfying to beat. With the no time exotic about now is a good time to get in there as next to nobody is doing old raids. You'll find some real cool people on lfg's. Good luck, but most importantly enjoy the raids- don't put up with any dickhead-ery! Be honest when entering fireteams and try the the mechanics like relics etc for yourself :-)