How does Epiphany affect skills?

Solution 1:

I have seen this too. I am pretty sure that the extra monk attacks that look like Seven-Sided Strike are from Epiphany's Inner Fire rune.

Inner Fire:

Engulf yourself in flames, causing your attacks to assault enemies for 353% weapon damage as Fire.

It appears that spirit spenders can proc Inner Fire, and cause a Monk "afterimage" to attack any mob on screen, kind of like SSS. Alternatively, it could be Inner Fire proccing off Area Damage effects.

Here is a thread with additional discussion: http://us.battle.net/d3/en/forum/topic/12285778532

UPDATE:

This thread has some more great information: http://us.battle.net/d3/en/forum/topic/12427543033#7

Procs on every spirit gen and spirit spender cast.

Spirit gen - procs a line-nuke fireball dealing 353% weapon damage as fire to all enemies in front of you (1s cooldown)

Spirit spender - procs a fire-image of your monkthat deals 353% weapon damage as fire to a random target within ~50 yards (1s cooldown PER target)

The way the spender version works -- when you attack with a non-generator skill [...], several fire-images of your monk will appear at random targets around you and hit it for 353% weapon damage as fire.