German Campaign using War Cab

[Imp]

Thank you learn something new all the time in this game, unfortunately you cannot adjust it to match the mission type.
The first opportunity you get to save after knowing the mission type is on the deployment screen & I assume the AI has already made its purchase by then.

Did some testing using 5,500 points (no AI bonus as battle) player 1 delay letting AI purchase but me deploy player 2.
4 battles per nation looking at artillery purchases.

Germans - Buy the least - most likely to buy rocket artillery
USA - Average - Off map mainly 105s but some heavies in there up to 8in.
Russian - Above Average - Off Map mainly a mix of light & medium plus the most onboard units, consistently the most plots of the 3.

Levels look right to me I would expect Germany to have the least & Russia the most. US is actually a good mix of suppression & hard hitters those 8in have to hurt - bought 3 out of 4 times.

UK - Nearly as many plots as the Russians but majority are off map, consistently buys 40+ off map units, so guessing I miscounted or some are still to fire. Looking at the purchases it consistently buys the regiments.

Modifying British OOB Regiments units 53, 54, 55 so they have 2 troops instead of 6 or 8 brings artillery purchase more in line with the US with around 20 off map units. It bought 19 to 26 still with a decent percentage as 5.5in - 4 to 8.

In view of this I have a hard save from the end of the last battle so going to reload using AI at 20% & modified OOB. Its supposed to be fun & we will still be facing a lot of artillery. Current levels most of my infantry in the top half of the map are pinned or worse & the majority deployed on rough hexes.
Only other option is a bigger map so arty is spread thinner but that means its ground forces are to.