stingray x mod clone

Hey all, I recently bought a Stingray x mechanical mod clone, i already have a box mod (iPV D2) with two LG HG2 batteries. The LG's are only 20amps and i was looking more so 22-30 amps. I don't really plan to go under .15ohms but i want to make sure im vaping safely. A follow up question, how do...