this changes for 5.2, since the set bonus will be change to more lava surges = more ascendance, it will be worth keeping 2-3 FS up if they can hit 20s+ of their duration.
---------- Post added 2013-02-19 at 03:53 AM ----------
pointless, atm most ele has too low crit, and more haste already makes you get more lava surges as it makes FS tick faster, i see no real reason to redesign something that works fine as it is.