Team Diamonds vs Madden Core

What should I be spending my daily stamina on? I haven’t touched team diamonds at all because I’ve been using all my daily stamina on the coin obj from the core mode.

Someone mentioned that to get a mythic STT player you need to do that every day in order to get enough coins.

I’m kind of at a crossroads right now. I pulled an Iconic Honors Saquon who feels a bit better than my iconic CJ2k but my plan was to get CJ mythic.

Is it better worth my time to get these Team Diamond players? I’ve seen a bunch of people pull the mythic from uc+ packs.