I have a hoodie that I plunder for having an IA defense in HMA. I went and looked through my event history and he tried to plunder me.
His army was *drum roll*
IA archers.
lmao
Not too bad, but here's some tips:
First, don't use rogues for defense. That 100 Attack is pretty useful in HMA, that can really hurt an attacking units, but rogues are an attack unit. Also, you don't want to use rogues with artillery and ranged units because they have such a low low defense and you've got them set up here with 4. When your rogues get hit, there's a very good chance for the Secret Identitiy to turn them into a Trebuchet, and they have low defense and slow movement. A skilled attacker (read: someone devious like me) will pick off your Knight and Armored Infantry then hit the rogues so they can turn into easily killed artillery, and they'll prefer to do it with ranged units.
Second, you'll want about 3-4 Heavy Infantry as the core of your defense mixed with other units. They have a high defense which makes them hard to kill, but if you field all heavy units, they're not too tough to destroy with an army of all ranged units. You can use the EMA Heavy if you're new to HMA and are still building up your units.
The Knight's okay for now if you don't have anything stronger, but don't make it a permanent fixture. Fast units aren't great for defense because they tend to charge forward under AI and get chopped to pieces. However, a single Champion is useful since it'll give a little boost to your other units when it gets killed, and the HMA Champ has slightly better stats than the Knight.