I can only do lvl 50+ battle dungeons though... that's the problem. You'll have to do the lvl 46-49 BDs without some of us.
Once enough of us reach lvl 55, we'll start doing Dark Holes and Hore Dark Holes to build up a relic weapon repository to distribute within the guild. (Those BDs are literally all we're going to be doing when we can't lvl anymore)