Doing some Tickington quests and showing off a prime powerleveling spot cuz why not.
In addition to frequent Metal King Slimes on B6 of Ruby Path of Doom, there's some late-game enemies with quite good rare drops. Master Moosifers drop Frostfire Fingers, the strongest non-crafted Claw in the game, and Godsteeds have Meteorite Bracers, which can give a boost of up to +200 for speed when reworked to +3. A very good place to make use of your Hallelujah (Hero + Jade + Erik) Pep power!
