For Dragon's Breath surely it doesn't matter whether you are using DMS or ADF? Both will need the image to be written to a disk on a real Amiga and then have the warp patch applied.
I thought that Dragon's Breath doesn't work because there is some protection which can't be imaged on either DMS or ADF.
Are you saying that you have a working DMS of Dragon's Breath which doesn't require a patch? If not, then it's hardly a disadvantage of ADFs, because I was able to write ADF images of the game to real Amiga disks and apply the patch to run the game, just as you used the DMS images.