It used to be that Screamin', RSR, Big Thunder, and Roger Rabbit were all frequently off the grid. That is not the case any more, and I wouldn't expect it to be the case again. Buzz is off the grid, but I imagine that it is partly because they just added it back on and probably only temporarily. One other ride of notice is Haunted Mansion. It used to be that it only offered FP during the holiday season, and the last few years it was sporadic. But it's been offering FP daily since May. It is on the grid though. Everything else off the grid is a show or M&G. Keep in mind that only the Frozen show in DL is off the grid, and you really do need a FP for it. The other Frozen show at the old Muppet Theater is on the grid. If you choose to get a FP for it you won't be able to get one for something else. Our experience was that the FP is not really needed for that show anymore though as the theater holds a LOT of people.