You have 5000mg sust and 2000mg test prop so I would just divide it equally into the 8 weeks and dose 3x a week for stable blood levels and to keep things simple
You come pretty close to using up all 4 vials in 8 weeks running it like this
.8cc sust mon/wed/fri=625mg
.8cc prop mon/wed/fri=250mg
Total ~900mg test
Now if you want to run a lower dosage or save that ***** sust, again just run the prop at .8cc and the sust that will expire soon at .4cc m/w/f. That will get you close to using up the 2 prop and 1 sust vial in 8 weeks.
310mg sust
250mg prop
Total ~550mg test