It’s just a philosophical difference.
Gryphonkit, my wife, is currently leveling all her 5* heroes to 2.60 even though she doesn’t have the ascension materials. Though to be fair, I would be leveling Obakan, if I had him, since I have 15 trap tools due to RNG.
I have picked three 4* and three 3* of each color that I feel are “good” heroes and am leveling them. They give me flexibility in situations were I want to use double strong and/ or double neutral. Then I will repeat the process with 5* heroes and coughcough6*coughcough heroes.
But I am playing the
P.S. Thanks for you very helpful replies on the forum Dante