Dude, your 20%-22% now.

If you were 200 lbs I would safely assume based on starting pics, and your most recent cycle pics, that at 200lbs you were 30-33% or so

As far as keeping what you gained, if you added 20, expect to keep 5-6 lbs of muscle.

But your not going to keep jack without a extreme caloric surplus during PCT and you'll have to continue training in a very unstable hormone status.

This is why we say get a good base, and I'm not parroting the cookie cutter "reach your Natty limit" stuff, but just a basic general base a little definition and arms at least fatter than a penis.

You started at Auschwitz refugee status. And with this cycle you moved to "what a natural average Joe" could do with a month of clean high protein eating and 40 minutes gym sessions 3x a week