When I fish the Texas Gulf Coast around Galveston, I find that a MOE fly (Mother of Epoxy) in amber works well. Mark Sosin and Lefty Kreh are also fond of the MOE for Permit and it is the staple fly for Caribbean guides for Bonefish, Permit and Mangrove Snapper. With slow strips, it will bounce across the bottom with the hook up and I feel you will be happy with the performance.