I use a lot of off-meta melee (if there is such a thing, since most melee can be made powerful). I guess the ones on my list that count as “mediocre” are Mios, Ninkondi, Prisma Dual Cleavers, Guandao Prime, and Twin Basolk. If we’re counting hidden gems, I’d also add Caustacyst, which I liked even before I had a riven for it, and now use on my Kullervo loadout as well.
I wanted to see this thing in motion, so I tried to search up the youtube video, but no dice. Every article on it is just copy-pasted from the original on the Express site, and I can’t get the embedded video attached to it to work. I did find an article on NIWA’s site about a species of sea pig, which looks similar.