Notes from author
By far one of the most effective PvP builds I've used. 38 poise is enough to resist one-handed greatswords, and the ninja flip makes you incredibly agile. The estoc is lightning fast with long reach. GMB makes sure you're not one-shot by sorcery, though you should be able to dodge it easily; you can use this to nullify buffs as well.
The bow mainly causes your opponent to screw up and get overly ambitious, but the poison effect can be nice as well from poison arrows.
And, of course, nine casts of WotG, which should not be spammed but used intelligently.