step 1: make a second pirate account
step 2: download a second launcher (or just have a launcher and use the internet browser version)
step 3: log on to both accounts and the pirates u wanna lvl up the infamy of
step 4: find ur other pirate
step 5: crew eachother
step 6: start a game of mayhem
step 7: have 1 pirate kill the other pirate until time runs out
and u can use no type of game other than mayhem
u may repeat steps 3-7/4-7 as many times as u want