While Axel mode does up the difficulty a bit (IIRC the final stage has enemies on the 4~500s, if you didn't start with Axel mode from the get go), it also provide a couple Dark World stages that are decent to farm equips and/or level up, so I don't think reloading a save file is necessary per se.

Here's a guide that covers one of them:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=882992198

If you're not that far yet, IIRC DW 1-4 is also decent, you can combine the Enteis and then use a combination of your attacks and the thief's PSN+SLP combo (just be careful with counters). I thought there was a guide for that stage here as well, but I couldn't find it.

Thanks for the response, I ended up accidentally saving over my Axel mode file (with my Adell save before final mission) so I'm power leveling a few healers on 11-3 then reincarnating them into other classes.

I will use the 3-4 spot when I get there. Is level 150ish good enough to hit 3-4?

It's hard to say what level it'll be good for it, especially since you've been reincarnating. There are some annoying/potentially dangerous maps, but even then, there's a lot you can do to cheese/mitigate that (for example, Kunoichis learn an AoE version of the aforementioned PSN+SLP combo. IIRC it's not guaranteed to work, but still very reliable nonetheless).

Like mentioned previously, even if it's not enough for you, there are options for you to exploit while in Axel mode, so don't worry too much about it. If you struggle to get there, you can follow a guide for some tips. Though I personally just brute forced it, Dark_Cecil's guide[gamefaqs.gamespot.com] on gameFAQs is pretty good if you're doing it the "legit" way.

Thanks, sounds like it should be fine then