The Basics
Poke a lot. Don't worry too much about combos or special moves. His best pokes are Jab and Strong (both standing and ducking versions of both).
His s.Fierce does a ton of damage but leaves him wide open for punishment if it doesn't hit. You must be very careful when using it and not to be predictable with it.
Basic Combos
d.Short x 3, d.Jab (1300 dmg)
d.Short, s.Short ~ hp Secret Crescent Moon Slash (2200 dmg)
sc.Roundhouse ~ hp Secret Crescent Moon Slash (2900 dmg)
j.Fierce, sc.Forward ~ hp Secret Crescent Moon Slash (4000 dmg)
d.Short, d.Jab ~ lvl.3 Slash of Supreme Judgement (6500 dmg)
d.Fierce ~ lvl.3 Slash of Supreme Judgement (7200 dmg)
j.Fierce, sc.Forward, lvl.3 Slash of Supreme Judgement (8200 dmg)
Advanced Strategy
Use the Fake Cyclone Slash to disorient your opponent. If they jump, use diagonal jumping fierce, crouching fierce or strong Secret Cresent Moon Slash which are good anti-airs. If they roll, try d.Short, d.Short, d.Short, d.Jab to put them towards the corner or kick throw to create a 50/50 mixup. Throw out a Secret Cyclone Slash just to mix it up, but at a safe distance. His dash is pretty good so if you Fake Cyclone Slash them and they do nothing then dash in for a throw attempt. Try to mix it up after the F.C.S. sometimes try two or three F.C.S. in a row to entice the opponent.