Puzzling. Diagonally opposed calipers not working are a sign of a bad master cylinder. That can often happen when bleeding with the pedal on cars that haven't had regular fluid changes as the moisture absorbed in the brake fluid corrodes the inside of the master cylinder. Its fine while the brakes are operating normally, but when the pedal is pushed past its normal position when bleeding, the corrosion trashes the seals and you lose one or both circuits.
What's odd is that you're getting no fluid with a pressure bleeder either. Are you using at least 2 bar on it? You need that to get through the ABS pump.
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