Just your regular run of the mill 40/40. One of my favorite weapons in the Claymore, but tend to use the Zweihander and Mura also (still working on gettin the Mura down pat.) I use the pyromancy to keep people on their toes and give me some spacing when i'm trying to set something up. I also tend to use it as a clutch move, when things are getting tight. Very easy to catch people off guard with an unlocked black flame.
Estoc is used for when i can't afford to trade, or when the opponent has low health. Has better range than the rapier so if i'm at low health, i feel a tiny bit safer, rather than using the rapier.
Claymore. Nuff' said. I pretty much watch how my opponent plays and adjust how i'm gonna use the moveset. If they tend to do a lot of roll r1's, i will two hand and use my roll r1 and catch them off guard while they try the same on me. If they try running attacks, i'll try to space myself out by tapping O, and backstepping. Just enough so i don't get hit, and hit r1 and smash them. Also, Claymore combos can be absurd. 2H, R1 R1 R2. R2 R1 R2. R2 R2 R1. It's endless.
The build also permits obviously a wide variety of weapons. I can be very efficient with a Chaos blade also, which let's me menu switch if need be.
Other variations are 28/40. I love running with 28/40's also.
http://mmdks.com/3gf0