I'm no expert, but my teal shoots have been very similar to a dove shoot. Other than, the water, hip boots, steel shot, and smaller limits, it was pretty much just like dove hunting. I bought some teal decoys, and I hate to admit this, but I even bought a Duck Commander teal call. I if could find them, you could have them. I wouldn't even tote your mallard decoys out there. Just my two cents.
It's been several years since I've teal hunted but it was always my experience that teal don't really care what kind of decoys you have. We used mallard decoys for years before we tried teal decoys and never had any problems. I think the most important aspect of teal hunting is scouting. They tend to prefer only certain holes and aren't like the big ducks when it comes to persuading them to come in to a place they have never used before. Just my $.02 worth.
All I gotta say is you got to lead them thangs a long ways because their landing speed is pretty swooft. Reckon flaps could help that. I love the sound their little webbed feets make when they "put their landing gear down." :biggrin:
I've seen them decoy very well and I've seen them not decoy at all. I would for sure take some kind of decoys. Sometimes I think they are flying so fast they can't tell what kind of decoys they are. If you've never been, take plenty of shells.