A comment on the main question:
"There are a few clues to the answer now that are external to the riddle, theres no reason this isnt answered. Its no work of virgil."
It's no work of Virgil made me think immediately of a classical work - a book or author most likely.
(not necessary - and cheeky, but) in OP's profile: "I do enjoy a bit of Dante Alighieri." - the hint to look somewhere like a profile (simply "outside") is in the previous clue "There are a few clues to the answer now that are external to the riddle"
I think OP was sick of this riddle being open for so long. There is no doubt now.
In a different puzzle by the same OP: "under a septenary of hate and fear"
Dante's Comedy is about 700 years old, and the 7 sins are a major theme. (Again, this is not necessary, but OP is sick of seeing it unanswered - look at the bounty!)
We are talking about the wonderful, the magical, the most classical:
Dante's Divine Comedy
The epitome of an evil the skewed letter would label
The letter 'X' when skewed gives '+', a Christian crucifix. We are looking for something in Christian folk-lore. Wikipedia states: "Allegorically, the Purgatorio represents the Christian life.".
To many is such truth, not a fable
There are many who hold these tales to express truth - this may be a metaphor for life (as it is in my opinion), or as a literal depiection of hell.
Held tightly by urges of the seconds
We are in the midst of sin (according to the story).
Within the sleepless cities that beckons
The entire Comedy is based in Hell, in 9 layers - the sleepless cities.
Twice I hold the path of tea
Forever you stay within me
"Path of tea" = a T-intersection. There were junctions explicitly mentioned in the text.
It is not glue that binds us
Nor the substance which I fuss
You are on your own in Hell. It is your soul, not your body (the substance) which is at stake.
Guarded by a significant worm
Your sight has gone, time to squirm
The Cerberus in Dante's Divine Comedy is described as having a worm-like head. Your sight has gone in the sense that you are powerless and dead.
I laugh at your extravagance
I assure you my acquaintance
The Ceberus is the guard of gluttony and extravagance (archaically, alone, "extravagance" meant: excess and waste - i.e. gluttony). I would also suggest that: Satan or whoever is amused by our sin (extravagance), since he takes his due.
Now, look in the newly added hint to this question:
"struggling I see this is a comedy
let the divine be your remedy"
This calls for a lynch mobbing.