Dyson is the most casual one. One daily to get the token you need and you are set for the day to make good progress without needing any other resources just to unlock the tiers and stores.
You can speed up the process by doing additional higher cost projects if you like.
After that Omega is your best bet.
If you have mire than one toon you could do one rep here and one rep there and then let them sponsor each other to mix things up a bit.