IMO the German Med fleet is one of the most overrated pieces on the board b/c in reality Germany cannot afford to send any troops from Europe anyway. The game is won or lost in Europe and Africa is merely a sidebar so to that end no great lengths should be taken to protect the German BB. A few exceptions are to send it to the WMed to threaten the Uk1 naval build so as to make them not build or waste a ftr to destroy a bb. However this assumes you have enough air to be able to attack all other units of the Royal Navy which is iffy at best. Another reason to spare the bb is by going to Syria on G1 along with a take of AES f/Libya this helps protect Africa and gives Germany a huge ipc boom going on into the game. However, its very difficult to say if Germany will be able to afford this in Europe without risking EEuro so in general I’d say that the best move is to simply kack the bb against the Med bb and concentrate air in the UkSz while using the transport to landgrab Cauc or whatever.