"Other" specialist.
His effect is specialist dependent and local.

When attacking an enemy with more specialists than specialists on your sub (or defending from an enemy with more specialists on their sub than your outpost), each specialist you have adds +2 driller damage (max of 6).
When attacking an enemy with less specialists than specialists on your sub (or defending from an enemy with less specialists on their sub than on your outpost), each specialist you have adds +0.2 speed per specialist in sub to sub combat (max of +0.6), or +10% shield regeneration per specialist (max +30%) while defending outpost.

Combat example:
Player A attacks Player B with a sub containing 20 drillers and (Tactician, Lieutenant). Player B's outpost has 0 shield, 27 drillers and (Foreman, Infiltrator, Smuggler).
Player A would deal total damage of 20(drillers) + 5(Lieutenant) + 4(Tactician) = 29, and beat Player B.

Feedback?

Seems kinda underpowered? It could be just me, but a max of +6 drillers destroyed, and only in that rare instance where the defender has more than 3 specialists in defense? Sorry, I'm gonna take an infiltrator over that.

It's an interesting idea though. Maybe there's a way to beef it up with some tinkering?

It would take you 5 specialists to get the same attack benefit as a general? The balance seems off. But more importantly i feel like its too complex of a specialist and doesnt synergize or counter any of the other specialists in any interesting ways.

I'm not a game dev or anything, but looking at the specialists that have made it in game, i think a good general rule is that specialists should have a function that is unique and specific (you should be able to explain waht it does in about the same space as the current ones), and should either compliment or counter at least a few other specialists.