Well,I don't know beans about Dartons, but the make shouldn't matter as you are dealing w/ a Weaver type mount, right? my bows are out in the shop, but I know my rings are not the "high" ones, that leaves medium or low. I'd almost bet a bhead mediums would work.

Edited to add; I have mediums and have to make sure the speed ring is not above the mount as it will bind on Lzone, so if your mount is real long, you may have to go to high rings. I can get my eye relief ok and keep the speed ring behind the mount. Excal brought out a new style mount to solve this problem, but most Excal guys or at least alot of them just cut some of the dovetail off the back of old style w/ hack saw and tuned it w/ file. My objective lense housings are both in front of mount, so height there doesn't matter for my bows.