Which Scorpion are you using and which fan? If it is the hoaye 127mm and a motor of over 550 kv or so your amp draw is going to be outragous; I can tell you this from experience with an HK4035-630 on 12S2P 9800 mAh pack it drew over 150A! Even on 10s it was too high.
I think the 5" fan is a better fit for the 120 size bobcat/falcon and a 3.5" - 4" would be better on the 50.

The main thing I've learned about wing loading for models is that it is very sensitive to Reynolds #, the smaller the plane the lower the wing loading needs to be. Any thing under 1 sq.ft and a loading of over 15oz/ft2 is a monster move up to 2sq.ft and 20 or so is about the same. The scale is not linear but 34oz/ft2 sounds pretty serious for ~4.5 Sq.ft.

If your examples are refering to full scale I think it should be lbs/ft2 not oz.