First of all you are already behind with a 18 bid, I believe the bids for classic were around 24 for a PA bid. (2 inf man, 2 inf EEU and 4 inf Lib) Means you will take Egypt with around 4 inf and an arm. The Allies can bring 3 inf (2 ind, 1 syr) 1 bmb and 1 fig. This will end in mutual destruction in the worst case scenario (in LL) for the allies. => Allies can counter a PA bid very easy kicking back the germans to the continent really fast and destroy the Axis bid in almost one turn completely. Only thing is that the Allies leave gaps in Asia and then the race begins (which capital falls faster, Mos or Berlin).
You can take some more risks as the Axis to have a better shot at the Allies, bet 1 inf in Manch (1 inf extra to lib) and take Syr on G1 as well, so it will be almost impossible to retake AES on UK1. Risky moves wich can cost you the game if they don’t succeed.