I'm gonna put this here so I never have to explain this again. These are my strats for the role method of death hole wrong warp.
Right off the bat, this setup only works if the grotto is on level ground. Out of the grottos you can use to DHWW, the only important one I've found that isn't on level ground is the Hyrule Field tree grotto.
First you'll want to get as close to the grotto as you can, or pretty close to it. An easy way to judge this is to side walk toward the grotto. Now face the grotto and get centered with it. Once lined up you need to do a 180 degree turn to be facing away from the hole (shield turns are easy).
Once in the proper position, do a neutral roll, sidehop away from the hole, backflip, sidehop towards the hole, and do another 180 degree turn. At this point you shield drop a bomb, however you can not instantly shield drop it after taking it out. This will result in the bomb being off-centered.
Immediately after dropping the bomb (to ensure you don't accidentally pick it up) do a backflip, flick your shield or untarget and retarget (to prevent you from doing a sideroll), and do a neutral roll.
Now one more neutral roll ought to put you into the hole if you did everything correctly. This final roll needs to be timed to after the bomb explodes. I estimate this to be somewhere between 1/4 - 1/2 a second. If you don't die you're too early. If you die on top of the hole, you're late. The timing is pretty lenient though.
Just to clarify this method with this setup is the most reliable way to do a death hole wrong warp that I have yet to find. It is also the easiest method I have ever used.
Enjoy