Map layout is much better in Pyros, 6 lvs in and you have access to all the aetherytes. The Pyros version of the Pagos dragon corridor is also easier, the mobs are lv 45 and there's a lv 39 aetheryte in the middle of it so once you hit that level you can just follow the teleport train coming out of the atheryte and run with the group to the nm instead of praying you can make it on time.
XP payoff is also good from the get go on both trash and NMs.
NMs spawn frequently and are clustered together depending on their lv. You likely won't be making it in time to the top half NMs till you're at least lv 39, but it's not a big deal cause there's quite a few in the bottom half of the map and they spawn fast enough where you don't get frustrated that all the NMs are out of reach.
You can skip chaining now if you're bored of that too. The bunny fate gives a decent chunk of xp and sometimes a logos crystal if you get a chest. If you're tired of chaining you can just pop into the bunny fate -> find chest if no NM -> NM -> repeat. It gives decent xp even when you're into your 40s.
Best of all is the logos actions. You can pick a defense buff to make it easier to move around, reflect for some solo play against magic mobs, attack buffs to kill stuff faster, etc... It's a really neat concept that finally gives you some customization you can edit to fit your play style. I really think that if Anemos had launched with them a lot less people would hate eureka and I'm excited for BLU because of it.