I got some spitting and popback from my first coil it certainly did require some adjustment. I didn't wind up having to change the driptip, but I do use the short (2 ml) version, although not the mini. IDK what would work best on the mini, but generally my berserker just took some time to "settle down." It was one of those idiosyncratic kind of things. I don't know if "one" thing I did solved it, but I actually wound up turning UP the wattage at first, and when I changed the coil, I think I went after slightly higher ohms and actually wider diameter coil seemed to help.
Good luck. I hope you get it sorted out, the berserker is great.
Anna