Yep, Take off you will have the greatest lift because of greatest weight. Lift is also greatest in a turn, particularly steep turns. Angle of attack (except turns and steep turns and other high G maneuvers) and high lift devices are irrelevant as they only increase the co-efficient of lift, not lift itself, when the aircraft is in steady level flight, i.e. they allow the aircraft to fly slower and produce the same lift to counteract weight. If this weren’t the case the aircraft would climb or descend. Also what do you think happens to lift in a steady climb or descent? It actually decreases. If you haven’t already got it, I suggest you get a copy of NAVWEPS, Aerodynamics for Naval Aviators. It is a US publication. The reading is hard going but it is a wealth of information.