I'm gunna have to go w/ the roller.... both the forehand and the backhand versions. There are just so many variables you have to deal with (slope, ground cover, rocks & other debris in your line) The angle at which you strike the ground is so crucial.... Also, I can't think of another shot that has a smaller margin of error.... between a great shot and a shot that ends up deep in the poop.
I'm gonna hafta disagree, with an asterisk. For sky rollers, as in throw a roadrunner with annie so it flips over and eventually starts rolling, absolutely!
But I find that if I just forehand a midrange right at the ground, like a very low tomahawk, its fairly easy to control for direction. Also a rolling disc is easier to sneak between trees than a shot flying through the air, so it open up alot more lines for you.
Star Gator, throw it straight at the ground. Fat rim rolls like a little tire, overstability makes it fight against flipping on its back, so you can really whip it straight at the ground without it just flopping down.
I'd say the long straight drive is the hardest shot to master. Think about it, many wooded holes are a tunnel of sorts, but most of them have some curve to them. Why are the straight tunnel shots, like the infamous Hole #4 at Blue Ribbon Pines, so tough and intimidating?
Because its a heckuva lot harder to get a disc to fly 400ft dead straight than it is to get it to fly on a 400ft curve. Especially since most ppl cant throw 400ft. If you short it on the curved tunnel shot, you are just partway around the curve. Thanks to inevitable low speed fade, if you short it on a dead straight route, its much harder to account for the fade and still stay in the corridor. If you disc down to a midrange with less fade, you lose distance, so therein lies the problem