Keep It Simple
Brother of The Benz, Tobias
You have through some very pointed questions made one of the simplist maintaince jobs into a bag of worms.
First, when bleeding the brake fluid system; new fluid can not pass the old fluid when it is being expelled from the bleeders at the calipers or ABS. The new just pushes the old out of the system. NO MIXIE!
It makes no difference the position of the bleeders to the brake hoses. Put that question from your mind.
If you logged onto my "El Cheapo" look see you would have seen a DIY pressure bleeder.
Take to heart all of the help that has been passed on to you and then DO IT!
Happy Trails beep Beep from The Spiderman in Houston!!!