If your players are still at Silver or Gold level then evo tokens are still plentiful. It is the 50 evo tokens to take one player from gold to platinum that will drain your evo tokens quickly. Prime players are even more expensive. Is have many players sitting at gold level 10 due to needing more evo tokens.
I am at the point where only keeping 5 stars makes sense. It’s up to your overall roster and depth on who you need to keep. Those are definitely the most popular clubs for bonus teams. Maybe Giants, Mets, Cardinals as well.