If that is the case (heh) I'd rather you give me the tech levels and designs and such as to be more accurate to the conditions you suspect you would encounter, to give you information that is more usable for you.
SF R/L and max tech (minus rocket engine techs that would slightly boost rocket arty), with double arty, tank recon, heavy flames (both designed to stress soft attack) and MPs will be adding 184.1 soft attack to the formation. 4mot+1 medium tank (designed to stress soft attack) would be offering 121.2, a 3/2 would be 164.4. A 10w would therefore have 305.3 or 348.5 attacks, across a full 80w being 2442.4 or 2788. Quadrupling the mot/tanks/width up to a 16/4 or 12/8 (more then tanks, not tanks then mot) would be 1337.8 and 1683.4. Which means the attack total increases by 83% or 66%, which means we're looking at a defense ratio shift of 55% or 60% of whatever we had assumed the original ratio to be. If we assume they had enough defenses for a 60% damage reduction, they would now only have only 47% or 50% damage reduction, which would be a 32.5% or 25% increase in average damage dealt.
This probably isn't really usable information though.