The SC are definately bad as lone gunmen. I had a single unit of rebel Estern Infantry outside Hatra. THe only unit capable of reaching them was a unit of SC. So off they went.
The battle was a horrible disaster.
I marched them up fairly close, rested a time then charged in. At first it seemed to go good, but then the chariots took losses and suddenly the EI killed the general. RATS! Lost 19 out of 28 and killed only 33.