https://plarium.com/forum/en/raid-shadow-legends/674_game-discussion/615875_arena---dragon/
looking at your champions here and ones that aren't yet 60...no, I would not do that. Taking speculative champions to 60 that you have no real intention of using other than Faction Wars is something you can consider much farther down the line, only when you're close to finishing off a crypt and really only if you're close to Lydia. In all likelihood you'll get much, much better options before then, especially in a faction like Dwarves.