Best Brigade/Division combos for Combined Arms

[GAGA Extrem]

So, since ARM is already at 30 softness putting a brigade onto your armor would actually reduce its combined arms bonus? Would this be correct?

Yes, but be aware that softness reduction is now real % based on the basic softness.

INF with 100% softness and -10% softness brigade will have 90% softness.
ARM with 30% softness and -10% softness brigade will have 27% softness.

And:
Reducing sofness is often much, much better for ARM than getting combined arms bonus.

 

[GAGA Extrem]

I'm a bit uncomfortable with all these calculations. Sounds like the game can be "solved". Working out the perfect combination of units/brigades in real life... how realistic is that?

Since a game is based on mathematic and algorithms, you can - of course - solve it. But to carry the results of in-game algorithm over to the real world is just - wrong.

Some unit combinations are better than others - and telling users about that is not wrong: Everyone can decide for himself if he wants to use the "uber-combo". For example, I rarely use SP-ART for my units, even if it would be more powerful than my regular builds.