Just some precision for those who do not know about these movements:
Sots press: Named after Viktor Sots who was a heavyweight Olympic lifter (old 100 or 110kg class). His "claim to fame" is to be the first "big" lifter to use the squat jerk. He invented the "Sots press", which is shoulder press done from the bottom of a front squat, first to improve his shoulder mobility in the squat jerk. But he eventually became very strong in this movement doing 160kg for 3 reps and 170kg for one. NOTE: lot of people use the name "Sots press" to describe any shoulder press done in a full squat position, including a behind the neck press done in a squat. In reality a Sots press only refers to a press done from the bottom position of a front squat/clean. To nm this is the ultimate test of shoulder, thoracic and hip mobility.
Savickas press: Named after strongman Zydrunas Savickas, it's a shoulder press done seated on the floor, with the legs fully extended in front of you. It requires a bit less shoulder/thoracic mobility than the Sots press but is a very good exercise to build core strength.
Snatch press from squat: What you refer to as a "Klokov press" is simply called a "snatch press from squat" and has been a staple exercise in Russian/Soviet programs since forever. So naming it a Klokov press would not be correct (although in our modern age naming a lift after a popular lifter enhance the coolness and desirability of said lift). It's an exercise that I personally preform quite often. Very good test of shoulder, thoracic and hip mobility but that is more easily doable than the Sots press.
I believe that the first use of these exercises is to develop shoulder, thoracic and hip mobility. At first these will be the limiting factor of the movements. But as these improve you will become able to use more and more weight.
So at first the goal should be to improve form on these lifts but once mobility is optimal your goal should be, like with any big lift, to become stronger. But don't rush it.
I personally stick to sets of 5 reps or less.