Progress through Chapter seven until reaching the end. Hack the weapons terminal before entering the final turret section. Select "No Shield Regen" while hacking to get +300% experience points. Also slot the x6 XP Multiplier, multiple times if possible. Go to the Jazz prison area and clear out the basic enemies. Once down below, go to the objective marker and jump on the turret. After the enemies spawn, use the T.E.C.H. XP bonuses and destroy each incoming enemy. Use each bonus as the previous one lifts. Either wait for Jazz to die or select the "Restart from last checkpoint" option before the end of this section to continue farming experience points. You will retain the previously earned experience points after restarting and can repeat the process as many times as desired. Play the "Lost Vault" in Chapter two and progress until you reach the "Search for the Leaders of the Insecticons" objective. Switch to Starscream and clear out the waves of Insecticon enemies. Once the room is empty, use the weapon terminal and leave it behind for an autosave to keep the experience points earned. Select the "Restart from last checkpoint" and repeat the battle as many times as desired.