User blog comment:Whiskey13/Roger's ability/@comment-3060121-20101124183653

He did use a sword so he may have been the strongest swordsman. His haki was (in my thing) far more advanced then others, as Rayleigh said he was able to feel the poneglyphs(excuse spelling). Even though he didn't know the language he understood it, he was able to hear the voices. But maybe that power had nothing to do with haki.