Since Alpha+ was so broken we gave up Alpha+ setup and there followers.
Basic setup is the best balanced.
First we balanced it by creating a US bonus on Philippines. Move 1 IPC to Philippines for every Allied win and move back one for every Axis win. Balanced within 7-9 ICP.
Later
We use modified alpha+ bonuses. German extra bonus in France. 5 IPC.
Japan 5 IPC for not declaring war against India/Anzac/US or France Indochina.
We are also discussing changing US entry to turn 4 and Soviet allow to declare war to turn 3.
Easiest way to bid is by bidding on an Philippines bonus. How much out of US 30 ICP bonus being in war should be put to a Philippines island bonus. No extra ICP in the beginning of the game because that destabilizes a complete zone. 12 ICP gives one axis power the possibility to do every thing what they want. Two additional G sub/tr, 2 Japan transports or two Italian subs/tr is way to strong.