The light end of deep drop lead, for moderate depth and moderate current.
Deep dropping is a weight-management problem before it is a fishing problem. You need enough lead to get down through current in a reasonable time and hold position on the number — but every extra pound is more work coming back up and more strain on the whole system.
A pound is the sensible starting point for the shallower end of deep dropping. Step up when the drift tells you to.
Rig it on a breakaway so a hang-up costs the lead, not the rig.