Timer reserved for TMSI-req release at MSC must be compatible with (BS-PA-MFRAMS).
BS-PA-MFRAMS may need reducement cuz it doesnt affect the paging load.
further more you can avoid 2th page by IMSI, or change the 2 page attempt by TMSI.(for all n/w).
For BSC try to optimize LA, by giving attention to SDCCH load (LU).