Convoy s2+ build

Hey guys , first build here bought the host (convoy s2+ XM-L2 U2-A1)
I’m looking to make the brightest light possible without producing too much heat.
What are your favorite driver/led/emitter set-ups for these ?

XPL W2-2B
http://www.kaidomain.com/p/S024853.Cree-XP-L-HD-W2-2B-White-5700K-6200K-LED-Emitter
those have a very nice neutral-cool white

on 16mm DTP star reflowed
XPL centering ring or glue the 5mm one in 45° angle on the star

7135*6 driver

FET + 7135 Driver