Why is there so much lag in Mushin's Tower?

[Melodia]

I have barely 50 ping outside of Mushin's Tower (including even tower lobby) and anywhere else in-game (even SSP), yet I ALWAYS have 250-400 ping in Mushin's Tower, it's nearly unplayable. Is this just due to shitty servers as usual? Is there a separate server for this single-player instance for some weird reason and are the servers in the north pole or something??? I've never even beat floor 8 thanks to this massive ping and ridiculously short enrage timer. I'm a FM with 518 AP and can't even beat something meant for level 45's. That's how bullshit this is. Whole second delay after every skill and impossible to time any dodges.

[Melodia]

So everyone experiencing same problem?

 

[iritsuchan]

I have high ping in f8 dungeons, but Mushin is perfectly fine.