Alternatively, one could be slow to farm regalia on the basis of just wanting to save up half-elixirs and seeds for when multiple days are missed (or wanting to farm certain 2nd reprints...), which is what I do. So I really only have the AP to start up raids on off days and the BP to join raids during advents and off days. For example, I'm a rank 111 player sitting at 5 fire, 60 water, 60 wind, 55 thunder, and 10 light regalia. I haven't spend a single regalia yet either.