I agree with those saying to have the caliper higher than the master when you disconnect the bleed syringe. Another tip is to lay the caliper on its side with the grub screw pointed upward – take the bleed syringe off and the fluid won't start to come out (with the caliper above the MC). Put a drop of oil into the hole (so that it's full to the top) before putting the grub screw in. Some oil will overflow when you put the screw in, but there's no trapped air bubble in your caliper.
I had seriously messed up a bleed on one of my louises, and recently tried another method that worked very well indeed. Place the MC so it is on the flat and the caliper is above it. Connect a completely empty syringe to the caliper and then remove the MC cap. Draw some fluid out with the syringe, then top up the MC. Keep doing this until you've got all the air out. Twang the lever a couple of times then push a little oil back through from the caliper (you'll probably see a lot of very small bubbles rise in the MC reservoir) to get any trapped air out of the MC piston.
One word of caution – be absolutely sure that your pistons are completely backed into the caliper. If you don't you will get dragging pads.