tailpiping all depends if you have enough airflow to cooldownt he wires during hits. tailpiping i wouldnt reccomend for vapers that do long drags, with tightened airholes as the heat builds up because of not enough airflow to cooldown the coils. I personally tailpipe most of the time on my mutation x , i can run 0.5ohms at 25 watts and tailpipe it due to the fact that i leave the airholes wide open, all the airflow cools down the coils while i inhale and never causes the RDA to get hot. With an RDA with few airholes that are like 1-2mm big, the rda itself gets hot due to not enough airflow cooling and i would never recommend tailpiping those.
thats the problem with most people at vape shops ive been to, they just know how to do one certain thing and think it works for everything else. theyre not actually informed about anything else other than the fact someone told them 'build this , this way, do this that way, and use this' they actually have no clue about the inner-workings or how things work, they are just told something with no clue how anything works, then just try to pass on the misinformation they are giving and relate it to everything without actually understanding anything. its like the equivalent of teaching someone 2+2 , but when u ask them what 2+3 is, they say 4.