I’d suggest you stop collecting feeders from your TCs for a while. You’ll be able to start storing up ham in TC20 pretty quickly if you do that. Then you’ll also have a big stack of feeders available for the next time you pull a hero you really want to max ASAP.
See here for more info on that (although you’re not really at the stage yet where doing this should be a regular part of your roster management).
ETA: A good half-measure would be to only stop collecting from your TC2.