Keep in mind that if you get into A.FLOOR and subsequently TOGA LK, you'll need to disconnect A/THR to regain thrust control. Otherwise you're stuck in TOGA.
Keep that in mind. the levers for a while before you think to disconnect it you're going to badly overspeed if at low altitudes.
Also if things aren't going well and you turn the AP off make darn sure you turn *both* FDs off too... that should be instinctive. AP off with FD on should be a deliberate exception such as short final with LS, or possibly VNAV if SOP allows.