In my last Romani campaign, I found Satres heaps of fun, and quite useful.

I'd fulfilled all Marian reform conditions, and was just waiting until the right year clicked over. I had established secure borders, and was developing my infrastructure and economy. But my army felt . . . restless. Cue Satres.

A lot of the time during a campaign you might find that when you're ready to attack with full stacks the enemy sends 2 or 3 units against you, while when they attack with full stacks your main army is somewhere else. Satres allows you (when you have the time and men free) to send the army of your choosing against quality opposition, confident that you'll be meeting a full stack with a full stack.

Satres is quite good at "weeding out" those troops who are, let's face it, crap. If you get all your rubbish troops killed, then obviously you'll be left with good ones. Train them up, drill with Satres, re-train and re-drill, and you can get yourself a real good silver chevron army.