It's been forever and a half since I did Axel mode (even more so since I did a NG using the code), so at best I can link you to some guides. Dark_Cecil's guide[gamefaqs.gamespot.com] from GameFAQs (look for "BATTLE 2-3: DANCING SWORD") has a few of tips (and even recommends this map for grinding to some extent).

Personally, though, I'd suggest unlocking/exploiting the Dark World (more specifically, 1-4 which you can see the details from Xeetos' Early Item Farming Guide), though beware that doing so can and most likely will break the difficulty curve (at least for the main game of both Axel and Adell modes). There's another DW map that's also commonly exploited (3-4), but you haven't reached that point yet (though if you used 1-4, you probably don't need to do this one).

Originally posted by neemoos:

It's been forever and a half since I did Axel mode (even more so since I did a NG using the code), so at best I can link you to some guides. Dark_Cecil's guide[gamefaqs.gamespot.com] from GameFAQs (look for "BATTLE 2-3: DANCING SWORD") has a few of tips (and even recommends this map for grinding to some extent).

Personally, though, I'd suggest unlocking/exploiting the Dark World (more specifically, 1-4 which you can see the details from Xeetos' Early Item Farming Guide), though beware that doing so can and most likely will break the difficulty curve (at least for the main game of both Axel and Adell modes). There's another DW map that's also commonly exploited (3-4), but you haven't reached that point yet (though if you used 1-4, you probably don't need to do this one).

Oh! Thanks for the tip. I’ll unlock the Dark World and use the exploit to get some levels

It's not so much for levels as it's for the items in the bonus gauge. Sure, you can get a bit of EXP and money on the side, but rank 38+ equips is what you'll be aiming at

Just hope you don't softlock yourself like I did back on the PSP version... Can't remember which level of Axel Mode is was, but merely completing the level forces you into a (basically) unwinnable battle where the only "solution" is to grind Axel Mode levels with whatever you have... Literally easier to just restart the entire game at that point.