How I want each theatre to look
Atlantic - British and US ships fighting German U boats in mid and late game. British trying to protect shipping lanes to their island and blockade Germany in the baltic.
Western front - shells fired every turn - preferably by both sides, keeping stacks from growing too quickly. Us does not enter in any major capacity for like 10 turns. France responsible for self defense with minimal help for a few turns.
Italian front - Early stalemate. Late game one side breaks through but not necessarily one side or the other.
Switzerland - so OP as a neutral that you won't dare attack them
Eastern Front - optional push by germany that if focused Russia can't repel but that focus requires sacrifices in the west or atlantic
Serb front - slow costly Austrian victory
Caucuses/Persia/Egypt/Arabia - Stalemate unless one side commits heavily. Weakening Entente forces on one or more of these fronts is a balancing option.
Pacific - Stalemate unless Japanese politics tech just swings this to a swift German defeat
Africa - costly Entente victory unless Cairo falls
Latin America - Neutrality respected.