The "best" idea ive had for it is have the expert roullete contain all level 80 dungeons, however have them scaled to current max ilvl, we know they can do this because the new unreal trials we are getting will be just this, level 50 trials scaled to 80. The flaw with this is that it could potentially cut off the ex roullete off from the dungeon ecosystem, so someone running for the first time couldnt be matched with someone from the ex roullete, unless they made ex roulleters sync if someone was present with first time bonus/ manual queuer.