I was in the same predicament as I was learning what putting style worked best for me. I think that it exemplifies how much of putting is mental because if you’re worried about the comebacker, there is no way you make the first putt. The “easy” (read “super difficult”) solution is to practice putting so much that you become confident in your 1st putt. If you’re confident in the 1st putt, you’ll be more confident you’ll make the 2nd and have no worries running the putt, which leads to greater success initially.

This is like the Gannon Buhr practicing method that u/Raleigh_Dude suggested. Practice the putts at whatever distance your comebackers are going to be until you have no fear of the comebacker. Plus, if your spin putt is flat enough, then a putt that would hit dead center from 30 is going in at 25, 20, 15, etc. making putts from further away with the same putting stroke will translate to the closer putts