I have an idea that I think would solve it fairly with only short term pain to the lazy and the manipulators.
Whatever size blocks you have or coin supply is irrelevant. Instead, only allow a wallet to mint once or twice per day.
That could work too.
However the manipulator will create multiple addresses to get around the 1-2 stake per day limitation.
Never mind, i reread it and you said "wallet". Mayhap that could work but thundertoe seems pretty intent on a minimum 1k block to stake with some growing scale requirement as time goes on.