Stacking Extraordinary Impairment Attacks

[EmptyOwl]

When building a foe is there some way to increase the amount of attribute impairment an attack does?  The current 1 point limit makes converting many 3e critters difficult.  Could one purchase it multiple times and "stack" it on one attack?

-Thanks

[Deral]

A decent alternative would be to either just increase the grade for tougher saves to make them more threatening, or give the NPC multiple copies of the same draining attack, along with the Frenzy NPC quality so they can drain multiple times a round.

[Gentry]

Keep in mind, too, that PC stats in FC aren't as silly high as those of more typical d20 games. 18's are as rare as they should be. So you may think you need more impairment on an attack when you really don't. 

[Foghorn]

Also a thing to remember when converting is that the FC version of the 3e monster isn't going to match up on a 1:1 basis on a lot of different facets, damage being a major one sometimes