Edged Rapier

[tbone]

Originally Posted by zoncxs

Also, MA page 122 expands the details:

"...Any weapon that also works with a non-fencing skill –
meaning any skill other than Main-Gauche, Rapier, Saber,
or Smallsword – has a mass distribution that lets it parry
flails at the standard -4. Examples include the short staff,
which can use the Smallsword skill or the Shortsword skill
(treat it as a baton), and any rapier heavy enough to use with
the Broadsword skill."

That provides a pretty definitive Official Published Answer (though it is listed as optional detail). The same page makes clear that the skill doesn't matter; it's purely a matter of the weapon properties.

So, to the OP: If you go by Martial Arts, your edged rapier can parry flails normally, regardless of skill.