I strongly suggest don’t bid if you are 4 or 5 players and playing face to face. Those games are complex to play and allies struggle to coordinate. Any bid could easily unbalance the game and favor the Axis. Even 1 ipc to Japan can mean 1 IC, 2 trannies in Japan 1, a very important change.
I play one FtF game with another 3 guys each week and believe me, I know what I’m saying. Last time, without any bid, Axis bought 1 bb and 1 ac for Mediterranean sea 😮 and they gave us the Allies the fight of our lives mainly because of bad coordination