Tiamat
I've seen the future...
Most of the fics I enjoyed are long since gone really, I lost a massive archive I has a few years ago which bummed me out to no end.
As for the fic i question.
In around 1998/1999 there was a fic series, kind of a virtual season before that became a thing. At the end of that first season, magic shenanigans had Angel end up with a son, that son was kidnapped from him and aged up via magic/time/space manipulation to grow up into an adult, to hate his father and to be used as a weapon against him.
Sound familiar?
Thus leading to Connor, a brat kid who by my impressions of him, I would gleefully watch to see get vaporized by a 150kt nuke.
Then again, by the end of BTVS there were a lot of characters on that show I wanted to see get vaporized by a 550kt, so take that for what you will.