Originally Posted by
Glenalth
The various Arcane Archer imbues work like permanent buffs. Turn it on and it is permanent until you pick a new one, rest, or it gets dispelled (Dispel Magic, beholder anti-magic, etc.)
You can use Flame Arrow created flaming arrows with the Arcane Archer Explosive Arrows and get damage from both at the same time. The only thing it will not add damage to is a bow with the "Flaming" property.
You can even do Flaming Burst bow + flaming arrows + Explosive Arrows at the same time for 3d6 per hit and 4d10 per crit.
I don't have the gear to test it, but I was told Eternal Flame from Red Dragon armor didn't override Flaming Burst on a weapon so it might be possible to do 4d6 per hit and 6d10 per crit.
The Conjure Arrows ability creates a stack of 100% returning arrows of the listed +. These arrows last until you log out of the game for a while.