It also depends upon why you have 22% revolt risk.
If it is because you have a neverending war, make sure to end all wars asap and war exhaustion will go away.
But since Ivan has the game-given ability to bring (non-)random events that increase revolt risk, you might want to cheat either by deleting them from the savegame (or reducing the revolt risk increase) or simply by saving the game and then loading. (This latter solution won't reduce the revolt risk you have, but it will stop Ivan from summoning up more such events and finally the troublesome times will end)
Make sure to shop for +3 stability and increase tolerance for orthodoxy to the max, and you should manage fine.