So, it's not about "light" and "heavy" revision.
Spaced retrieval practice, quizzing - the best bet. Just make a bunch of quiz cards now and then go through them until you know everything. Facts are the basis of everything. Skills are groups of knowledge.
Just make quiz-cards, quiz yourself and then if you get it right, put it in one pile - wrong goes through the other. Go through the wrong ones more.
Simples.