The following video shows how to draw on an elevation while picking the points on another elevation. This can also be used with any other command (e.g. move, copy, place cell) and in combination with keyins
Keyins to: activate AccuDraw ; Origin; Top; SmartLock; StickyZF11 - O - T - Enter - LZ
You unlock the StickyZ by keying LZ while in AccuDraw Focus (and Enter). Then the Compass jumps to snapped points (e.g. to select another elevation) and you may start another round.
You can find the DGN shown in the video here.