10% vs 100% Enhancement Method... Which is BEST?! (Knull 60 - 70 Cost) | Marvel Future Fight

Is the 10% enhancement method better than 100%!? Using Knull as an example and my own previous experience, I breakdown which method is the best, the costs for each, and when you may want to use one over another. I also showcase the total cost needed to upgrade Knull from 60 to 70 as well as the total cost to push for rank 1!