the only thing i would be doing with a sub ohm
rda on an evic is checking resistance. even then i probably wouldnt trust it. once you get to the core of RDAs you will find that the vapor production and flavor comes from correct airflow and your coil builld. a cheapo $5
rda can outperform a $100+
rda if you build them right and can also be done without even touching sub ohms.