In reply to jaredwaywell:
I do Middlefell fairly regularly with clients as an approach to Gimmer. Do Middlefell and Curtain Wall, then scramble directly upwards to gain the main path (about 15 mins from the top of Curtain Wall to reach the path). Turn left and go to the cairn beyond the boggy bit, then take the faint path that contours around westwards to the gearing up point for Gimmer (about 15 - 20 mins walking). If you want to do Ash Tree Slabs you'll need to descend under the main buttress of Gimmer, then up the gully a short way. Ash Tree Slabs leads to Ash Tree Ledge, not the top of Gimmer, so you'll need a plan to continue from there. You can climb Oliverson's Traverse and Lyon's Crawl at the same grade as Ash Tree Slabs to reach the top of the wall, or A, B, C or D Route at Severe. It is possible to scramble down from Ash Tree Ledge, but you'd need prior knowledge of the route to do it safely. It's also possible to abseil off either down Asterisk at one end or the broken ground next to the first pitch of Bracket and Slab at the other end - abseil tat is usually in place for both, but take your own just in case. And make sure your ropes are long enough for the abseil!
Hope that helps.
Graham Uney