Nice comebacks..you are on a good level
Btw honestly i don't think i can answer to your question...i simply do what i know i have to do (or at least i try;p)..is more like instinctive (i neither did know what "momentum" meant until 1 year ago). Imo a good training is to have clearly in mind what will you do (but for do this, in the meantime, you have also to try to understand what the enemy will do or, in case both of your are doing a comeback, you have to understand in which position you will arrive in contact) and try to do it. It will take a lot of time before you will be able to do it most of the times (since i don't think there is someone that can do it always), but before you start and before you will learn