Which fight are you talking about?
If it's for the first, here's the strategy I've used.
Start out by making sure Shroud is level 14 or 15. Remember not to use Wind Shove, since Sparrow is immune to stun. Squall is a much better technique to use, although if you got the Gouge from the three lancers, just attack. Try not to have Shroud's health fall below 1/2, and you should be okay. Oh, and you can upgrade Shroud's armor at Gino's and the crafting room before you leave Port Arianna.