In reply to Jus:
If you can work out the old xc route at Wharncliffe then that's good but not the easiest to find or follow.
If you've done Cannings then I presume you've done Parkwood. Greno woods is similar to Cannings but a bit tougher.
You could go up the broken road from castleton, turn right, mam nick, drop down to Greenlands, back up to the ridge then down into the back of castleton via the campsite.