I have been dripping for almost six months now. As of today I own four RDAs which I will give you some personal opinions on.
My builds are very simple. Single micro coils ranging from .5 - 1.2ohm using 24 or 26ga kanthal. I use either a 2.2mm or 2.4ish millimeter screwdriver to wrap on.
My first RDA was a Magma clone. It's stupid simple. Two post, bottom airflow. It is built for flavor. It can chuck, but then you lose the flavor and rick second degree burns. It can leak like a box of rotten tomatoes. It has been my #1 att over the last few months.
I recieved a Veritas clone and authentic Mutation X3 shortly after the Magma. The Veritas is a thorn in the ... to rebuild. Once you've spent two hours positioning and wicking your coil, all is well. Great flavor, decent airflow, and leakproof. The Mutation X3 is collecting dust somewhere in a box. Try as I may, it never hits my sweet spot. Dual and single mode, wicking, positioning, airflow... it never seems right. She sure can chuck mad clouds, flavorless clouds though.
Today I brought home a Freakshow Mini. <3♡<3. It has the flavor of the Magma with the bottom airflow, but allows for good lung hits. Super simple to build on.