>The further you get, the less RP becomes important despite having more things to spend RP on
>Every kagura shrine
>Every sky island dungeon (2 each)
>Every terrestrial dungeon
>Even a couple of the maps before you even reach the dungeon
>Free RP refill lanterns a day
That's not even to bring up the 100% heal hotspring you can teleport to for free along with a buff for the rest of the day.

The only possible way you'd ever need to eat something to regain RP is if you blow it all on a boss fight doing nothing but swinging the tool around for every attack and SOMEHOW the boss isn't dead after a full bar of that.