My advice would be to consider doing the ring anti clockwise thus taking the water with you when traversing the Ashton Canal, its not unknown for some of the pounds to be low.
There should be no problems on the Lower Peak Forest with the best overnight mooring being just beyond the swing bridge at Dukinfield. This gives a full day to do the Ashton, mooring at Piccadilly Basin before the Rochdale 9 unless of course you do good time then straight on to Castlefield.
If you need water there is a point adjacent to lock 18 on the Ashton, next point being YMCA arm at Castlefield followed by Agden on the Bridgewater.