I grabbed the Triton rba for my Herakles (yes, it works). I found the best coil setup is 3.5mm parallel vertical 4-wraps of 26ga. It reads .48 on my istick 100W. I used a round mini file to open the wick holes in the rta head to 3mm for high VG and have yet to get a dry hit using OC or Rayon wick. Airflow is a little more restrictive that the OCC Herakles heads, but vapor and flavor are good. No leaking or seepage. I tried horizontal coil first, and was less than happy. Dry hits if less than 10sec between puffs.
TL;DR: If you try the Triton RTA head, build vertical parallel.
TL;DR: If you try the Triton RTA head, build vertical parallel.