I like the idea of splitting the day in half of playing at a higher limit with less tables, and then dropping down one limit to massive multi-table. That way you can still get a good amount of hands in, get better, and try and get a decent rakeback for the higher levels you play.

sort of like spend two hours on one, and then two hours on the other.

I have tried six-max though and I don't think I have the stomach for it whereas I have patience for full ring.