https://pathofexile.gamepedia.com/Toxic_RainSince the DoT stacks and it has a 1 second base duration, investing into skill duration greatly scales your damage without introducing too crazy build up times.
you have 3 types of damage:
1) you shoot arrows, there where they land you Deal (50-72.8)% of Base attack Damage
2) there where the arrows landed, you Deals (6.7-283.7) Base Chaos Damage per second PER SPORE POD, Base duration is 1 seconds
3) AFTER THE BASE DURATION ENDS, SPORE POD explodes for 50% of Physical attack Damage Converted to Chaos Damage
so, you added lightning damage support only works on the initial arrow (1)
so your, physical bow damage only works on 1+3
if you have a fast bow and a slow bow, same dps, your fast bow will deal most DoT (2) damage
if you have a big damage (slow) bow, reduced duration will increase your clearspeed but have almost zero effect vs boss
if have a weak damage fast bow, increased duration will increase your clearspeed
This post was edited by Tommyvv on Feb 21 2019 09:43am