Get a Carthus Curved greatsword (or, if needing to scale it down a bit, the warden twinblades). Infuse them with blood. At 7 luck you get 72(60) bleed. And, AFAIK, R1+WA+R1(L1+WA+L1) is a true combo on pretty much everything. Enjoy your instant bleed.
On a luck build it gets even funnier:
50 bleed on a Carthus Curved Greatsword while still having over 500AR, 84 bleed on the warden winblades, and 97 poison on the rotten ghru dagger. Spam R1 with the dagger, poison the enemy within seconds, and then either bleed them to death with the winblades and the above mentioned combo, or go the old fashioned way with a heavy threat of bleed using the CCG.
(Also fun fact, I made this build to troll people with the Frayed blade: 60 luck and 40 dex for optimal damage and bleed buildup, and catch people in the weaponart; two of them combo, do large amounts of damage, and are pretty much guaranteed to proc bleed