>>2085097In Aurora 4X, expensive units are usually better because they have more fighting power per weight, which lets you dedicate more space on your army transport for shielding and armor, so they can actually make it planet side.
The game skips keeping track of HP for individual units. Instead you will randomly kill an enemy unit based on the armor pen and damage you have per turn.
(Simplified but inaccurate example: 1 damage vs. 1000HP equals a 0.1% chance to kill, it doesn't reduce the enemy's HP or anything)
This means there is no such thing as a target being too heavily armored or beefy. Anyone can kill anything.
The lowest weight class, light infantry, is open to imagination, but it could easily be a human rifleman.
The highest weight class, super heavy, is probably equivalent to the 4-legged walkers in star wars.
A single rifleman has like a 1/1000000 chance of killing that per turn. But 100000 riflemen? The losses will be severe, since super heavies can mount multiple weapons, which means multiple attacks per turn compared to the rifleman's one. Riflemen also cannot equip armor that stand up to heavy vehicle weapons, so every attack kills them guaranteed. But they will get lucky eventually if God is on your side.
Just imagine them mounting an assault into the vehicle's interior or something, if the image of AK-47s killing a mech doesn't make sense to you.
You could just tech up to super heavies and just build those and be extremely effective, but I like imagining hordes of riflemen fighting like it's WW2 in space.