I have just opened 55 Orbs, using both potions, and the analysis is as follows:
Total cards: 275
Expected legendaries: 4.4
Flipped legendaries: 8
Expected Gold: 11
Flipped Gold: 9
Total value of 55 packs: List $85.72 Market $80.70
@0.352 per card EV thats a $11.02 Loss
I Got less epics than expected and the mythical GFL (still waiting for one) always brings up the EV.
Best Pull (but unfortunately only one):