that one wasn't there on the IO site yesterday, nice!
I have used the xp-e2 for several mods (eg, in a sk68 mod) (the 1D tint that Illumination Supply sells), all dedomed because that is what you want the xp-e2 for: minimum die size driven hard for maximum throw. If throw (or a bit less exteme: a tight hotspot) is not the goal, you should use the more efficient xp-g2, can be driven harder as well.
The maximum output (on a Sinkpad), as measured by match, is reached at about 2.5A, so it is counterproductive to go over that.