I'd suggest going to YOLOcoaster first (As you said) then going through the park in a counter-clockwise fashion. The back of the park is really dead the first hour or so of any day -- Even a Saturday. Whenever I go I always do YOLOcoaster, Goliath, Lex Luthor, Colossus & Scream (If I feel like riding them) Batman, Green Lantern, (Usually skip this one), Riddlers Revenge, Jet Stream (Again, if I feel like it), Apocolypse (If theres 1 Train and the lines more than an hour, Not worth it).
Usually by this point I head back to Johnny Rockets or something and eat, then walk up the Hill of Death by the YOLOcoaster Tunnel Entrance and go to Superman, afterwards I head to Ninja (Again, If im feeling it). Tatsu would probably be next but usually the line is crazy (Tatsu's Line is about the same all day, sadly) so that one is just when you feel like waiting. No matter WHERE you are in the park id go to X2 around 3:30-4ish. By then its pretty dead and you should only wait at max 30 minutes. It stays pretty dead until it starts getting dark.
Obviously this fluctuates each time I go, but its a good way to go as you ride a lot of the rides in the back without a wait because nobody is usually back there until 11:30ish.
Hope this helps!