Arkfield batteries are not replaceable. Olight 18650 and 21700 batteries are replaceable in the lights that use them but only with another Olight proprietary battery.
Convoy S6 with an Osram led. Fenix PD32 or Acebeam P16 if you don't want to wait for the slow boat from China. Surefire EDC1 or 2-DFT if you have an unlimited budget.
Nitecore MH series have a tactical mode which always activates in turbo from the tail cap. Output levels can be adjusted via side switch but there is no memory- always starts in turbo. They also appear to meet your other criteria.
The sp35 runtime is better likely due to lower output and the fact that it has a much better driver than the others. It throws better due to reflector design and the led used. The 21700 sofirn lights I have all can run off 18650 and include the adapter, however you get reduced runtimes and may...