The internal resistance of these cells is relatively high, so no high power delivery. Cells can do 7A, but voltage sag gets really bad as usually happens when you push a cell to its limits. As I see, best suited for buck drivers on 1S emitters (LD-29, for example), providing good performance over a fully regulated mode spectrum (LD-29's first low voltage warning is at 6.7V, which would be 0K here as it wouldn't pull more than 3A from the 2S cell pack even for a decently overdriven emitter).
If you are aiming for a compact sized XHP torch, I'd go the boost way. With a sense resistor mod, I believe Kaidomain's H1-A could reach 5A, or at least well above 4A if cooling isn't up to par. There's also the GXB20, which looks pretty awesome:
A cell like the LiitoKala 26650-50A can provide the 10+A required for that to happen.
High current tail switch advisable. :-)
Cheers ^:)