Lv. 4 is the perfect place for Meditate. I wouldn't sacrifice dmg as early as lv 2, but there's no reason to wait for lv 13 to take it. One point early gives you another weapon in your aresonal--not so much for the heal, but if someone's towerdiving you, suddenly you have a ton of health and mr, and are even healing some. It'll help much more than a bit more damage on your Q or E.

I jungle alot in ranked, and I've found out when jungling with Master Yi you should max out Alpha Strike first as it will work as an extra Smite, and @moumoon you really don't need Meditate in the early game, and as you should max Alpha Strike first because it will make you jungle alot faster, just make sure to take Wuju Style on all the other levels, except on 6, 11 and 16 ofc.

+Rep if I helped

Just wondering, why won't you get Meditate early game? It's a great sustainable ability. I would get one point in it at level 2, so it has a low cost. Still, a nice start to your guide!