Elfboy described that as one phase out of many. If you look back at his informative bio, there were various periods which he represented by some key behaviors. He vaguely mentioned some motivations but none of them match up with key motivations. Anger was one such motivation. Being a hero to others was another motivation.
There were five distinctly spelled-out phases to his childhood into adulthood. 1. The defender/protector/hero phase; 2. being picked on by bullies and retreating into a shell/confusion/caution phase; 3. an anger phase (although he was not aware of being angry), learning to defend himself primarily verbally, as you pointed out; 4. another quiet phase, not so much socially withdrawn this time but more of a self-confident charmer; 5. college, and drawing on his 3-ish ability to appear as one ennea-type while being another.
If I were forced to abandon the idea that he is a 6w5 I would have to go with 3, but with the wing type unknown. 6w5 still fits him better than any other type, to my mind. But not the 8 who willfully seeks out conflict, whereas he seemingly only attracted it at phase 3 as a kind of magnet for trouble.
I often use the "unknown-wing" to eliminate the wing's core type as a possibility.
That being said, I haven't denied that much of what Elfboy writes on himself comes across like the 8, although, among other things, he was rather too quiet and sensitive a child for that. Self-describing as a charming adult comes across as a higher-level 6, far far more than 8 or 3. Three's become charming as a manipulative ploy. Sixes simply want to make a good impression for various, more healthy reasons, mostly I think simply because they ENJOY being around other people.