make sure you are using a catch bottle on the bleed side - this gives you the advantage of using liquid as a one way valve and it prevents air being sucked in.

raising the bottle above hub level but below master cylinder level ensures the weight of the liquid keeps the bleed submerged. Very easy to do. Bench bleeding a master cylinder is quite easy to be honest. its the same cylinder working as used by many other cars on the road.

A little experience I got was that the first 10 or so strokes on an empty system should be very small - this is to prime the system and not force bubbles to multiply into smaller bubbles. The rest is taken care of the bleed bottle setup.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)