Black Knight Axe +5 and it's forward + R2 attack = Pwnage 
At 580 attack, it does 550 damage to the giant soldiers in Anor Londo, even with the boosted defense. And the Axe is surprisingly fast, faster than the Halberd and equal swing speed to normal, smaller axes.
@blkfish92 - Yeah, the maximum is +7. Each new Fire Keeper soul you get you can use it for Humanity, as each is worth 4 or 5 humanity. I'll try PVP'ing on Anor Londo after I finish the bosses there. I'm still at SL 116.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
