Yeah that would be Meta-Meta Quality.
What thread? This layering stuff is a bit new.
People aren't realizing that there are two kinds of High 1-A layers
Dragon Talisman High 1-A thread
From what I've read in that thread :
8th Deathless and below is non 1-A
9th Deathless is 1-A proved by BDE second Type 2 and a R>F statement
10th Deathless is apopathic to 9th Deathless, with 9th Deathless unable to imagine and describe them.
Later when the MC reached 10th Deathless, the apopathic part is described as trascending the duality of 8th Deathless (non 1-A) and 9th Deathless (1-A). Ultima agreed with 10th Deathless being High 1-A (Meta-Qualitative)
Now here comes the wrong part in that thread. After 10th Deathless (Meta-Qualitative), it's revealed that there's 11th Deathless. The difference between 11th Deathless and 10th Deathless is the same as 10th Deathless and 9th Deathless (Qualitative)
9th Deathless can't imagine and describe 10th Deathless (aka apopathic).
10th Deathless too can't imagine and describe 11th Deathless (also apopathic).
So since the way 11th Deathless transcend 10th Deathless (Meta-Qualitative) is the same way 10th Deathless transcend 9th Deathless (Qualitative). I believe that 11th Deathless is Meta-meta-qualitative.
Now, if it's true that 11th Deathless is actually Meta-meta-qualitative, then Dragon Talisman is gonna get a hell of an upgrade.
After 10th Deathless, it actually has no end at all, with there being 11th, 12th, 13th, etc. Basically endless hierarchy of Deathless. Each gap between Deathless after 10th is the same as 10th with 9th, with the lower Deathless unable to imagine and describe the upper Deathless.
10th Deathless (Meta-Qualitative) can't imagine and describe 11th Deathless. 11th Deathless ( Meta-meta-qualitative) too can't imagine and describe 12th Deathless, and this hierarchy goes on endlessly.
If 11th Deathless is Meta-meta-qualitative, then with the gap between them, 12th Deathless should be Meta-meta-meta-qualitative. This should be the same with 13th, 14th, etc with endless hierarchy of Deathless. Aka endless extension of meta.
The MC at the end of the story trascends the entire framework of Deathless hierarchy. No matter how high you are in Deathless hierarchy, the MC trascends it. I don't know whether the MC would qualify for High 1-A+, but even if he didn't qualify he would still be the strongest High 1-A.