My preference was the .5Ω Clapton replacement head out of what kangar offers for the sub/top
tank.
I also liked the sus316L .5Ω heads, never tried the ceramic .5Ω heads, the 1.2Ω & 1.5Ω heads have a reduced airflow / more of a MTL, work better at lower power.
The
rba deck is simple to build & use and works well.
There isn't really a 'best' everything in
vaping are matters of personal preference / what works best for each individual.
Different liquids (flavorings, sweeteners, pg/vg ratio, net, wta etc...) will taste best at different power ranges, airflow & inhale technique also plays a part.