Referring to this big picture
Stoney Indian South (Main Peak) is visible at center.
Stoney Indian Middle (Pinnacle) is at right-center.
Stoney Indian North (lesser peak) is out of view at right.
It appeared to me that SIS would be easiest on its South Ridge or close to it (left skyline in the pic). The red cliff band is likely the biggest impediment. But there are some notches in the ridgeline so maybe keep just right (east) of the crest. Or go straight up the gut of the East Face.
SIM looked more difficult--especially getting up through the red cliff.
SIN looks like a piece of cake. Just a ledgy walk-up.