Deathfire Touch

Comparing to
is superior to in following scenarios if a mastery is proced only once. In every other instance does more damage than  as it scales better or at least as good.
 * Single target and Damage over Time application: or  is needed to match the damage of . As most Damage over Time abilities last at least 3 seconds, they share the same damage as single target application.
 * AoE application: is needed to match the damage of.