Boss Dean Smith rolled out a new-look 4-1-4-1 system for last weekend's trip to Crewe and duly watched the Saddlers end a five-match winless run with a 3-0 success.
He kept faith with an unchanged side and formation for Tuesday's short trip to local rivals Wolves and claimed a memorable 1-0 derby victory.
With no new injury or suspension problems, Walsall are expected to keep faith with a winning formula for the visit of the Millers.
Rotherham, meanwhile, have defensive worries for their trip to Walsall.
The Millers, who are protecting an unbeaten record, will be without Claude Davis (hamstring), while Craig Morgan (ankle) is rated as doubtful.
Utility-man Pablo Mills could come into defence alongside Kari Arnason should Morgan not make it, though rookie Dan Rowe has impressed boss Steve Evans in training and the reserves.
Midfielder Michael O'Connor (groin) is definitely out, David Worrall (groin) could be involved and there should be a place in the squad for new loan signing Tom Eaves.