Well, I'm having a change of heart about Commandos. Having 2 is too many because one is enough. They do less DPS than any other ranged DPS class as far as I can tell. What they bring to the table is a CC, great AOE, Grav Round armor debuff, and they can heal. Lastly, they are in heavy armor an have a strong shield cooldown so they are more survivable than other ranged DPS classes.

I'm not sure if all of that makes them better than a DPS Sage, but they are close I'm sure.