I can upgrade GH and use the forge during CvC. I sell most of the forge gear. Its a source of silver for me.
Are there any other CvC activities that are not part of the fusion?
just the things that are only worth points in cvc and not any other events/tournaments. forging, gh upgrades, skill tomes, grinding minotaur or potion keeps, spending gems, and using glyphs only help during cvc tournaments, as well as clearing faction crypts, opening cb chests, and winning tag arena matches. there most likely will be a tag arena tournament sometime during the course of the fusion but it won't actually be part of the event, just happening at the same time.