Can you upgrade the Chemical / Toxin general? Cause the Infantry gen will win against the Chemical / Toxin gen. IMO Chemical / Toxin gen is the weakest general of the whole game.
In Contra?? I didn't realy play Contra.04 enough to say, but in Contra.03 I thaught Chem was very strong. the silicon clouds were death to my aircraft, and all his ohter units were pretty good too.
Its most likely just a matter of play style. Most players favor a Turtle and power/super weapon game play, so the say SupW and Nuke are the strongest, (nuke realy is strongest in Contra) but if you really like a rush Robot and Flame are grerat generals. Tanks are great for a mass attack etc... Stealth general is a true love it or hate it army.... as long as you play what fits your style you'll feel they are strong.