Its nice to see we all differ slightly, at the moment im doing one of the 3 once a day as a 'morning routine' at 7am.
I structure it like:
Mon: H1
Tues: Stretch (front or middle)
wed: Foundation (all 7 movements)
Thurs: stretch - thoracic
Fri: H1
Sat: Stretch (front or middle)
Sun: Foundation (all seven again) or rest or my 'weakest' movement.
Yes i know all seven foundations in a day is excessive but i recover well, young, eat like a horse, sleep like a log etc. otherwise i'd split like Jeff above and do a 3/4 or 4/3. i feel that once a week is all we really need on each element to progress as long as we chip away for long enough. so i would say don't be worried lowering the amount of foundation you do to incorporate other things.