The swordmasters are your key unit. They're durable enough, especially against shooting, and hit quite hard. Decent bravery 7 basic, better with the banner (which I assume you will have from the Spire of Dawn /Island of Blood stuff that it seems you have) Keep a hero within 8" of them, and they may well not need your general to use Inspiring Presence to protect them from battleshock. You'll want to keep the reavers away from comabta, and I would probably split them into 2 units.
I might suggest the Obstinate blade on one of the weapons (can't be mount I think) to give it extra rend.
And I'd suggest for command trait Strategic Genius that lets you use two command abilities.
Ultimately, trying things out and see what works for you in your games, especially if you're new to playing the game. There's nothing like experience to judge things