>>5246241Techmarines are more than just repairmen. They are still full blown marines. And for that matter, why would it be a bad idea for every soldier to also be a repairman?
For that matter, the standard Tech-Marine:
-Is afforded greater mobility by their servo harness (the novels have scenes where a space marine knocked down was basically able to push himself back up instantly, guns still firing from his mechandendrites)
-Where the average marine can only fire from guns on his two hands, the techmarine has multiple arms to fire more, and the additional strength that hydraulic servo arms provide
-can command a squad of 5 servitors, thus allowing us to bolster our forces
-will still be able to act in a squad
-Has +2 wound save and +1 more leadership than the average space marine (The flesh is weak!)
Other things that I think could be useful and would make a bit of lore sense:
-has the potential to be a one man pilot. we could make them smart enough so that any soldier can walk into any vehicle, plug his cords into the interface, and don't even have to use his hands to steer or operate the vehicle turretry. He could even awaken the machine spirit within to aid in automated fighting capability
Our legion potentially benefits from similar rulesets to the Iron Hands, could even try to homebrew some.