I just got a Melendor costume, and I’m really new to costume heroes. I asked which one should I level up and ascend to get best bonus, the original hero or the costume hero ? Thanks
So your costume can’t exceed the ascension level of your original hero:
Example: Your Melendor is 2-1, then you can only max your costume to 2-50.
There is a FAQ which helps provide a lot of insight to Costumes see link below:
Please continue discussion in the thread linked above.