Denis Stoikovski :
I have 59hz monitor but can i cap it at least at 70 cause when its 60 it will always dip to 57-58-59? Or its recommended to be 60.
Vsync will cap it to your monitors refresh rate, so 59, but if you use nvidia inspector you can try whatever cap you want. Give it a try, if you don't notice any physics/water bugs then stick with it.
I don't know the exact point at which skyrim begins to have problems, the general consensus is that the problems start somewhere above 60 fps and get worse the higher your framerate gets. When I used to play I was running around 100-140fps had the same issue with the water bug (I had flying animals too), so I just capped my framerate to 60 and didn't do any experimenting with what framerate the problem starts at.