The thing to do is practice all this with a competent instructor. When I did my ME CPL, the FI failed the engine and then made me do 45° banked turns in both directions - into the failed engine and away from it. It was a useful exercise.
Addition of a vortex kit to some aeroplanes reduce the Vmc to below the stall at any sort of altitude so you'll stall first before you reach Vmc. The dangerous area is where Vmc and Stall coincide so that they occur at exactly the same moment.