I'm going through the YouTube videos of Majnu2006, his Middlegame Training excercises. I treat each one as a Stoyko excercise trying to limit myself to less than 1 hour. I will include the pgn with all the variations I find. I'll try to add my evaluations of each line if I get the time.
My main choice would have been Nf4, but I didn't get to analyzing Rhf8 or some other candidates. I missed the strength of the idea of either Qa7 or Qb6 taking the a7-g1 diagonal and penetrating White's position completely. My evaluations for the most part were not bad, but i think the lines were in general very clear cut.