Guitarists only need a 1x12 25-30w combo , that's what the guys used that I used to play with , and the guitars had a lovely sound and it was a sensible volume.
I auditioned for a band a few months ago and the guitarists had a 4x12 each , they didn't even need a bass player as there was so much bass comming from the closed back cabinets,
I declined the invitation to join as life's too short for screaming guitars at practice and small pub corners.