Ah yes, an assassin mech function would make that mech more useful. An engineer would be fine, except it might be overbalanced because then you could just heal your mechs every time you get hurt and be invulnerable. Unless it costs money or something to repair, but that doesn’t fit (aha! I shall patch up this mech with dollar bills!). An artillery mech does not sound useful as it is. But if you had a mech which could transport artillery mechs... I think that would be too complicated. Maybe the artillery thing could work like siege tanks in starcraft? For those who have never played starcraft, I mean that it would only be able to fire when it braces and immobilizes itself.

Also, are there going to be weight limits on mechs? For example, flying mechs can only have so much weight. And does weighing more slow your mech down? Because then it would be cool to have weaponry which weighs down the target mech, like a net gun which shoots out weighted nets. Aim at a flying mech, fire, and watch it fall to the ground... and hurt some mech under it. Now that would make the game interesting. And thinking about overheating, would getting hit by flamethrowers highten your heat level?