After listening to many podcasts from the permit anglers in Florida (will benson, Nathaniel Linville, etc.) I think most of those guys are throwing crab patterns that they keep moving a lot more than a static crab. They seem to all favor a version of the inverted merkin. SS flies permit crab is a lot like what all those guys are fishing. Even the strong arm merkin is a variation of this theme. If you watch “black tailed devils” or “Satori”, you’ll notice they all are stripping on the eat. These are the guys winning the tournaments.
They also don’t use heavy crabs. The strong arm merkin, which seems to be really popular right now, is designed to hang out in the mid water column. It’s tied with XS wapsi lead eyes. All the permit I’ve caught were cast to and stripped and the fish ate mid water column. All hooked in the lips. The idea of a really heavy crab that is cast ahead of the permit and allowed to sink until the permit is within range, then tug just enough to move some sand probably doesn’t happen as much as we’re lead to believe.
It’s been my experience that permit are on the move. Cast to them, and start stripping to keep up with their movement. If they’re moving slow, you strip slow, once they turn on it and are coming at it you strip a bit faster. That’s what I like about the SS flies permit crab and the like. They’re light weight and easy to cast. They land softly, which is important because permit don’t like the splash of a heavy crab. They look great when stripped and because they’re lighter they stay at the right depth when stripped. They still sink relatively quickly, but you can keep them at a depth you want when you strip them. They can also be allowed to sink to the bottom and sit if you want. The strong arm merkin, if tied right is great because the claw’s main function (aside from looking awesome) is to make sure the fly flips over.
Also, don’t forget to have some shrimp patterns. Bead chain and small lead/medium lead eyes. The number one permit fly at the Xflats lodge in Mexico is the veverkas mantis shrimp. Size 4,6 or 8. This is also a great bonefish fly. Again, take this with a grain of salt as all my experience has been in Mexico. If you’re serious about catching permit though, I’d recommend spending a week targeting them. You’ll learn a lot!