Hi,
unfortunately I tried my luck for all MBB offices in Middle East (after being rejected from Europe/US) and got rejected by all of them. Now, just out of interest, I wonder whether it is due to my cover letter, as I didn't explain "Why Middle East?".
Regarding the second point you made: is this also the case for Roland Berger? I am asking because, in the application portal, if one wants to apply for two different regions, he/she has to apply separately.