I saw your tags >:)
Have you read my other post on the topic?
If not, maybe you should. Sure, classpects materialzing as Strife Specibi in Homestuck is a thing, and it’s good for the narrative. But apart from all preference, there’s body types. And there is a choice. Maybe Knights often like swords - are you gonna force them all to use swords, then? It works the other way around. The trolls and kids start with their strife specibi before any god tier business happens, because they use what they can and want to use best. You’re free to go with a weapon that, judging after canon (which is just a row of examples, really, look at Dirk and Nep) would match your classpect, but if you can’t wield it or don’t like wielding it, what’s the point?
Picking the wrong weapon could get you killed, and SBURB doesn’t dictate anything on that matter, either. Look at John, who ended up wielding a big ass hammer he could never have sported as a mere teen, and who was aided by his god tiering in that. He picked what he wanted to, and it worked out (sure, he’s an Heir of Breath, but still). Rose’s wands kicked ass, even though magic without explanation seems more hope-y or void-y to me. What gives? It’s what she likes and she made it work, hella.
And about Seers: Seers don’t have to prove SHIT that they’re of their aspect. I’ve now heard twice of ‘meh, being a Seer is so passive and idk’ and I can’t stress enough how Seers are the informational base of the team without which operating anything in that murderous game would be SO much harder and more dangerous. And they’re not helpless. Look at Rose. Look at Rezi. They. Kick. Ass.
So: Pick whatever the fuck you like, cause you’re your own person.