It is an overkill to use 86fhr on barbs anyway. Anyway, not trying to disagree with you, but I have to refute that your problem don't lie in not having enough fhr. It is the build. In Diablo PK, it is not fair, as only certain builds can compete. As far as I know, most to most, a char only has up to 2 or 3. Versus a godly pk'er, fun builds defintely cannot win. This game is not like Counter-strike or DotA. In Counter-Strike, so long you trained the reflex of that gun, you can pratically rack kills with it. But not in Diablo. In Diablo PK, some builds is superior and some are weak.
I can gurantee you that every reputatable trap sin kills Singers with one eye closed. Singers aren't a challenge for Trap sins at all.
Sorry for reading..