Originally posted by Class A There is no Godox receiver which will support remote power control or HSS in conjunction with a Pentax dedicated flash.
Any radio trigger will support triggering the flash (with manual power control at the flash) if the shutter speed doesn't exceed the sync-speed of your camera (1/200s for the K-1).
The Cactus V6II supports the Metz 52 (using the Metz 50-AF1 profile). However, you'd have to do trigger stacking if you want to control the AD200 at the same time. Note that I'm note sure the trigger stacking would work.
Sad, I just upgraded to the godox x system and love the adjustability of having a tt600 and ad200 thru the pentax transceiver. I guess it was asking too much to have an off-the-shelf solution to transmit PTTL protocol across brands... frustrating.