Given that we are a special equipment based empire, it would make sense that heroes would be given special equipment(due to our character's awareness of their influence on morale) that requires resources that are not practical to grant to a significant portion of our forces. But you need to be careful with that sort of thing, what is impractical now is unlikely to stay that way.
So something like using brute-force to replicate technology that is only a couple of levels away from being practical. Or just giving them a bonus to, or higher multiplier from, their technology scaling traits.
Can we create a magitech sniper unit that is equipped with a thaumic driver but is not an officer?
The paperback is a scout, not intended for combat, but with a recruit in it and the mana barrier up it could probably drive through a raider encampment without fear of destruction...
We will need to find out if a Thunderhead can traverse over water. Dealing with off-shore platforms will likely require some form of assault force and we would need a way to carry them there.
As for the initial assault, I suspect that the thaumasled idea could be reworked into an all-environments assault vehicle. Mount some stabilising propulsion units on the sides to allow it to right itself in heavy seas. Block external gasses with sealable ventilation and preferably a reserve air supply. And give it a pair of top-mounted machine-gun Turrets, or one heavy machine gun turret if we can get HMGs.
I want Magitech infantry, but at the moment the elites are largely fulfilling that role. Infantry work best in large numbers and our squads are already filled with specialised entities. If we put the two reserve recruits into squad B then upgraded all of squad B's recruits into infantry then that would work well. But we are all excited about vehicles at the moment, so that isn't likely to happen. What would it take to give the infantry Personal Mana Barrier?
Tell them that we will deal with the raiders, lets say, within six months. They have probably been dealing with the raiders for long enough that six months sounds unlikely and we should be able to live up to it. Putting a time-frame on it will add an air of certainty and help build our reputation.
We should invest in some transport vehicles to improve salvage rates.