I have run these batteries since the day I started vaping. They are a 35A pulse but only 20A continuos so you do need to be careful. However, I have several shop owner buddies that run these in their mechs like I do and they have used .08 coils on them and they work fine. I honestly don't understand how and I am NOT advocating that, but it has been done by several different people I know without any issues.
On the other hand I personally run them on a .4 Mutation X and my .26 Darkhorse and I have never had a problem. As with any battery and setup with a build that low the batteries do drain adequately but I get a good day out of a single MXJO and I chain vape like no other. With ohms law anything below .25 on a 20A continuous battery is getting pretty dangerous but if you know what you're doing then hey! all the more power to ya. These are great batteries and most shop owners will tell you these run better than Sony VTC5 duration wise and they don't get warm as quick. I'd at least say buy a pair (should cost around 20$ for 2 online - 30 a pair in a B&M) and try them out. I will never buy anything else besides the Vamped batteries I saw recently which are 30A continuous and 40A pulse.
Happy Vaping and good luck!