With the addition of emblems being at 8/8 became more important than ever. Easy to do with 4/5 stars but 3 stars not so much. I have failed far more than succeeded on maxing 3 stars. Even using color stacking 10 2 stars for 40 percent chance, going above max XP needed at ascension lvls, using duplicates when able.
Any chance SG could intro a feature to add SS lvls after you have maxed the hero?