quick battle

Any title, Any map, but preference for WW2 and large scale engagements. Strong preference for Quick Battles and force selection, but I wont turn my nose up at a good scenario. Cheers.

I'm buying forces for a yuuuuuuge totally ladderworhy qb on a yuuuuuuge hilly but open map and it makes most sense to put all my points in heavy armour which makes for a very specific kind of gameplay only... How would one go about avoiding this?