In reply to tmawer:
In reply to your original question, shortest/quickest route is up The Band.
However starting @3SS is a pleasant way up and not as "abrupt".
My personal preference would be to start at 3ss and go over the Crinkles to 3 Tarns then up Bowfell. You'd have to retreat the same way if you needed to get back to a car.
Another alternative, offering a circular route is up the side of Browney Gill almost to Red Tarn, then over the Crinkles to 3 Tarns, Bowfell, Ore Gap, descend from there or carry on over Esk Pike to Esk Hause and head back to Langdale via Angle Tarn & Rossett Gill.
But the isn't much difference in profile between that and The Band.
HTH
:~))