Lol
Charged heavy does 55stance damage
Highest on average bosses have like 90 stance
Higher onces like godfrey have 120
You can stance break 95% of the game with one charged heavy and the rest of 5% with two
You can also give it blood affinity and build up insane blood build up, since for some reason the weapon has innate Arcane scaling which will make your bleed go bonkers
Oh did i mention the charged heavy has Blood AoE that builds up blood regardless?

Also has ridiculously high base damage
The only reason its not strongest weapon in the game is that blasphemous blade is legit braindead L2 stick