So is there some cutoff where these disappear?
I'm nightfae, so obv I did a bunch of Campaign missions with Dreamweaver, now those are lvl60 and impossible, but there's no way to level anyone up given regular missions give very very little xp.
Or were the silver XP missions just removed? I doubt that; I'm sure it's Campaign progress, but it seems broken because I still have some very low level followers.