I'm just worried about the light having bad efficiency on the highest mode. I read some reviews of the prime C2, another Armytek with the XHP35 and it has a very bad efficiency at the max output. I think that the 5.7 A may actually be true, meaning that the driver efficiency on the highest mode is very low.
On the other hand, everything else with this lamp seems wonderful, even the tint seems great.
Turbo2 level is high for a single 18650 and will get a short runtime with even the best 18650 and the most efficient circuit. I am satisfied with turbo1 with around 1hour runtime. But you can get the Barracuda battery tube and run it with 2x18650 and that will surely give an hour or so runtime with turbo2. Yes; the added length may be a drawback because the single 18650 size is perfect in the hand.