This is how I achieved and worked very well as a group if all cooperate properly.
Game mode: Heros.
Boost: Team of 6 players.
Map selection to aquire 006/Janus: Station, Memorial, Carrier & Sewers.
MI6 team will be random, select a player as bond meet in middle of map you need to kill with proximety bomb LB but it will not kill with 1 blow need to shoot a little have 006 let u know when screen bloody then use LB kill achieve will pop you will need to wait a few seconds as all achievements have a delay (there are other ways to let each other know when red if you prefer another method this is to assist u a guide not hinder).
Negtive feed back please xplain don't b weak!