I got through the Moonflow without dying once. It was MUCH easier than the Mushroom Rock Road. Ochus usually got petrified with one or two hits from the TKO, and pretty much any other fiend (and Garms, Bunyips, and Snow Flans can be taken out in two hits from Tidus, Auron, and Lulu respectively).

I'm just about to get on the shoopuf and fight the Extravator (sp). Luckily I have two Thunderstrike weapons for Tidus and Wakka which should make things a little easier.

EDIT:

Those Serum armors an above poster mentioned are DEFINITELY a good idea, but since I'm past the Moonflow poison isn't too much of a worry anymore. If I had them before the Ochu's then maybe, but I'm not sure if I'll pick them up now.