I hope the replies you received here, are not the only research you've done on the subject. Most authorities and folks who have been in bad situations in catamarans seem to feel a sea-anchor is the way to go. You should obtain a copy of "Drag Device Data Base". This book has several hundred first-hand accounts from people who have actually used drouges & sea-anchors on all variety of boats.
I've never been in a life threatening storm, but as I understand, other than a well set anchor, the only device that may keep you off a lee shore, is a sea-anchor.