Hey buddy,
there is no reason for a topping anymore, the plant wont grow that much in size anymore, especially if you shock her now.
You can cut off the big fan leaves on the top tho. they shadow your whole plant, it will have the same effect like a topping now, with less off a shock for the plant. I would advise you to cut down very big fan leaves all the time. they just shadow too much space and the plant doesnt need them in late flowering. But dont cut all, better a big fan leaf than wasted space in the tent that is empty. Just the big ones on top and very bottom. if they dont get much light on the bottom , the plant wont benefit from them and it highers your RH and chances for mold