The alchalite scimitar reminds me of the Flamberge from Tales of Symphonia.
I've never heard of that til now, But after some google searches I completely agree with you.
the alchalite scimitar looks a bit odd, maybe a bit thick
That's because it is. I assumed that since it was a higher tiered blade it would need to be greater and more powerful.
So I was bored and browsing Facebook and I kind of bumped into this.

I was making character assets for a pixel art comic skit and posted a snippet of 7 out of like 200 characters that I've made.
Apparently over night my Reddit post got 500 upvotes and I got featured on the official RuneScape Facebook page.
Welp, Time to start cranking out comics.
Also if anyone wants to see more assets and characters.
