Maybe go 2 infantry if you are going to do it by amount of units not cost of units. We tried a bid of 9 (3 inf were placed) and the axis got steam rolled each time.
So your saying with fortune cards not in game Allies win 40% of the time without 2 inf but 60% with the 2 inf bid?
Negative. I am saying a bid of 6 where the allies placed 2 inf resulted in balanced matches whereas a bid of 9 where the Allies placed 3 infantry lead to strong allied victories.
Obviously, skill, dice and players use of the tactics cards all contribute to the end game result however if you are using a bid for the first time I am just making the suggestion that a bid of 6-7 is a good starting point. That way your group can play a few games and work out if you need more or less.