ok you say you're comfortable with 50-50 next try a boardslide bro... you already turned the board a little on the last 'dance floor' box. so just progress from there.
backside boardslide the first
50-50 then boardslide the second (looks like it goes up/down or up/flat)
last one try do a 180 and land in 50-50. if you dont spin enough it will get you used to the boardslide and you'll be more confident on the first boxes. if you land it it will give you practice riding out switch. from there you can progress to boardslide 180 off etc etc. good luck!