I've not found the Subtank mini all that hot imo. It does like to spit a little sometimes, and it's a little picky about how well you screw in the coil head. The 1.2ohm occ does need a slightly longer and softer drag to get a good hit. On the heat issue: I know that joyetech made drip tips for their models that had a heat dissipating inner section.
Not allowed to post links yet - try a search for 'Orochi Thermal Drip Tip'.
Not allowed to post links yet - try a search for 'Orochi Thermal Drip Tip'.