Here is some information on the patch notes. The phrasing seems to indicate that Triple Spark always recovered max HP; I thought it was 20% HP. Did they somehow fix the tooltips incorrectly? Or did Triple Spark change? Or have I somehow missed the fact that I recover full HP when sparking?
Demonic Eruption & Celestial Eruption:
Fixed tooltips to correctly state 500% weapon damage bonus and recover max HP to match functionality
Patch Notes: http://pwi-forum.perfectworld.com/showthread.php?t=1319171