Hellish chasm converts base damage to fire damage. Does it include damage from crushing echo? Damage from weapon? How to test it?
Or is it just “read description five times and pray there is no bug”?
The base damage of a skill is the amount that it has not coming from a weapon or other skill or passive points. Any adaptive or untyped damage (ie, flat spell damage that doesn’t specify an element) from the weapon or passives is also coverted.
It’s easy to check, if you have a lot of % increased damage of the original (or converted) element but little of the converted (or original) element, the damage should change quite a bit when you take the conversion node.