ColonelTHE FASTEST BY FAR STRATEGYWhile boosting BEANS BULLETS BANDAGES you mass loads of exp, when I unlocked my BEANS BULLETS BANDAGES achievement I had 300,313 experience. If 24.200k is needed, you should get it in 4-5 sessions. (If all goes well)
Here is my link for full details on BFBC boosting sessions: