How to beat Guillen?

[Ravo]

I have a problem. I'm on the lava level and just acquired the bracelet and then the boss fight happens. I lose. Over and over. I'm on normal difficulty. I looked up videos on Youtube of beating Guillen on Nightmare and they all show the same thing: Guillen with a massively gimped turn radius. On all the videos, he goes in a wide circle around Adol with plenty of room to wait out his fire and get in some hits. On my playthrough, he can turn so tightly that I can get hit by his head and midsection at the same time. I thought I was overleveled (17). Is there a trick to this or is it repetition until I get lucky?

[Quint the Alligator Snapper]

I am not exactly sure what you're doing but I wonder if this may be affected by refresh rate. I've heard that affects Ys 1 (particularly a boss whose turn radius becomes insanely tight on 144 Hz) and Ys 2 but I have never heard about it affecting Ys Oath.

[Berahlen]

Yeah try capping the framerate. I'm not sure that bug happened in Oath, but it did in a couple of the other Ys games on Steam. You're supposed to be able to stand inside a circle almost exactly as big around as your whirlwind, on all difficulties.

17 is dead even with him, so you're not overleveled.

[Ravo]

I never did find a way to drop Guillen's turn radius to the intended value, but I did find a strategy that let me work around it. Moving as far away from it as possible when it emerges from it's hole, then jumping and using Ventus multiple times in rapid succession to put some more distance between us after it gets close. This mostly prevented the damage by it being on fire. After that patience and getting in any attack I can did the trick.

[41b3rt]

i hated this boss so much reminds me of volvagio from oot. just keep trying and be patient he is a pain in the ass.

[Doeskanakker]

I defeated this boss with Adol at level 18 + broad sword, when I tried it the first few times Adol was level 15 and was defeated every time. So I would recommend grinding a few level and then try again. (if you don’t have the broad sword it can be found on the northern map of the lava area)

[Ravo]

Uhmm...
I finished that fight two days after starting this thread, I even posted how I beat Guillen in spite of the massive difficulty spike revolving around its turn radius. That was over a year ago. This may sound harsh but this thread didn't need to be necro'd for the advice of "grind more" when what was needed was an entirely different approach to the entire fight.

[Person]

For anyone wondering, I was able to do this after grinding up to level 19 and getting the broadsword.

Just go to the one room before the save point and go up and down while listening to some music or podcasts. It will take a while but it's worth it.

Battle went from completely impossible to a breeze.

[Berahlen]

This may sound harsh but this thread didn't need to be necro'd for the advice of "grind more" when what was needed was an entirely different approach to the entire fight.