No worry fellow DH
as I can see now the TnT drop has been increase lately,seen alot of people starting to their TnT and getting quite nice roll too.
so don worry too much
for now try to get thing familiar ,
with skill and optimise them with your gear.
if you have lower AR try use perfectionist and awareness .
these 2 passive do help alot . (Grif below 32)
like my quote says you not going to do any DPS if your dead
but above for Grif above 35 ,is 1 Hit kill for DH

(Jailer, bombartment ,thunderstorm)
those 3 element kill DH instantly no matter you have 1k AR
so try to learn where the safe zone and where to plant your sentry.
and not plant them blindly
This is tower defend build remember
Have fun

True.... Experienced yesterday in grift 37.. Mati katak all time..