Thanks, @GraspingVileTerror 🙂
Well welcome to the Team, @Zepp! As @Six-Six said above, there's a whole gang of us on Reunion. Sure, we have other characters too but yeah, YANA! And it's not just The Praetorians SG here, the Hounds of Love have a subset called Yellow Brick Road dedicated to the same thing.
Ok, now that you've hit 50 there are still things you can do. Obviously if you have a base you can use a Pillar of Ice and Flame to do any Praetorian arcs you missed along the way. You can also scoot to the bottom of that list and do the Belladonna Vetrano level 50 missions set in Praetoria, provided you physically go to Night Ward to start them. Same for Emperor Cole's Personal Story.
If you can be part of a team/league that starts from Echo Plaza or Pocket D then the Cathedral of Pain and all the Incarnate Trials are open to do. As is the Summer Block Buster. The Hallowe'en holiday events are as well but we've passed those.
After that? Lots of fun in the AE! Check my own sig if you're interested for several dedicated canon related Praetorian arcs.
AND! If you've not already done one, the Seed of Hamidon event in First Ward!