How to get in:
Send private chat invite to P312F3CTxAS1AN
veiw profilex2
join session in progress

what to do once in:
kill bots until you have reached lvl 55
back out and prestige
join session again
repeat process until at desired prestige

what to do afterwards:
go into a XBL match and kill one person, then back out and presto, everything is permenant.

Last but not least:
once you join game please post legit, thank topic, and +rep (if you can) otherwise i close lobby