I would like to do all the content mentioned above actually, but not all on a weekly basis. So the frequency might be a bit too high for me there.
I think to get everyone acquainted with each others playstyle and online times we should start off with a large(more difficult) monthy or 2 weekly raid (so a 12-man anything) things like 3man and 6man instances are not something we actually have to organize on a planner since they are already being created at random with the players currently online. I doubt anyone would sign up for a Dome of Stars T2 while there are enough people online ingame at that time to simply create a group and go.
I'd say, lets try to get a nice 12man raid going in the near future! My preferance goes out to OD, ToO or Erebor Raids T2C since I'd like to learn to lead these myself in time :)