Currently playing on a private server CatseyeXI that offers different game modes for players. There's the classic wings mode (which I'm trying out) that's the 75 level cap era grind of the first four expansions of XI. There's accelerated catseye which mimics retail allowing you to have double exp, faster skill gains, and the use of npc trusts so you can solo. Then there's the hardcore crystal warrior mode, which is self found only and you can only party up with other crystals, and I believe when you die you go back to level one.
Curious if anyone would want to play. I'm mostly on during daytime est into early afternoon if that's good for you. I could do nights too but only up to about 11 pm since I try to keep a sleep schedule.
https://www.bg-wiki.com/ffxi/Category:CatsEyeXI
Here's their wiki page that details the exp and skill gain rates and whatnot. afaik it's about the same as horizion when playing wings mode.