I wish i could say, but until i get my hands on the game, i have no idea what to do with division compositions. All i know is that i am willing to sacrifice some soft/hard attack to get more defensiveness/toughness. And also i am willing to sacrifice soft attack to get hard attack. And i am willing to sacrifice raw stats for better terrain bonuses (such as replacing artillery with engineers).
I also want as low supply consumption as possible.
But of course i want a balanced division, i believe my divisions will be quite conservatively built. But who knows, maybe i am willing to take more casualties to be able to deal more damage to enemy. (aka take more artillery but less infantry, aka more soft attack but less defensiveness/toughness)
I would like my Panzer divisions be basically similar as motorised divisions, just with armor added in as extra. But who knows.
My elite Panzer divisions will have a lot of heavy armor and will be as big and strong as possible, despite the cost. They are elites that are heavy limited in numbers, maybe only 1 of them as Germany with rest being more regular panzer divisions, so cost won`t matter.
I also want my divisions to be able to do a little bit of everything, i don`t want to take special units just so i can attack mountains. I will build mountaineers also, but they may not always be available for what ever reason, so i want my standard "line" divisions to be able to do a little bit of everything.
Sorry for confusing formatting of this post.