Floating through the void, digging a hole

Working on the second units for each faction and I'm already agonizing over balance, why do I do this to myself? Anyway, while all factions have all types of units I'm trying to make them each have their own flavour, for example the Steel Legion is the slowest, but most heavily armoured faction and this is reflected in their Skirmisher. Miner's aren't fast, but they can soak up more punishment than other Skirmishers.