Ele benefits from the static Int and the proc, but the proc is devalued greatly because Lava Burst crits regardless, and that is one of our strongest spells, whereas an Int proc would benefit Lava Burst directly. The trinket is still very good for Elemental, because of our 250% crit damage from other sources, but the fact that Lava Burst doesn't benefit at all makes a lot of Elementals dismiss it.
To answer the question, it would be an upgrade for your Ele friend and a good one, but probably not as strong as it would be for an Aff-lock.
Xandy, I also direct you to look at the Warlock forum more in detail, because the Lei-Shen trinket is completely dismissed by some locks and considered almost as good as wusholay's/hydra by others. Might be the same size upgrade for both of you.
Last edited by Michelangelo; 2013-04-10 at 11:23 PM.
Still no answers ? /sadpanda