De-domed XM-L2 U2 1A/1C/SinkPAD, 4.5A Nanjg (sandwhich style, original driver as contact board), solder wick in the tailcap springs, UCL/p lens, 22 gauge teflon (or silicone?) coated wire. Oh - also the SinkPAD was AS5'ed on a copper disc, epoxied to the pill top - extra copper heat sink there, and copper on the inside of the pill under the pill top.
It's basically what I did to mine, that I posted in a T08 thread, with the de-doming added, so results were right in line with what I got, de-doming made it a little more than double, or about double I believe. Think I got over 100 kcd in my non de-domed T08.
Details on my build are here: https://budgetlightforum.com/t/-/16808, and the final posted throw # was 100 kcd with 2 Pana PD's. Probably higher with 2 Samsung INR 20R's. Also got Samsung 20Q's and they seems to be as good as the 20R's. Waiting on the 30A rated Sony's from FT.
Its a parallel battery setup -- please check the link above - lots of details/pics there on the T08.