Thanks for the ideas. i went with;
3 qts vr1 syn 20-50
3 qts val syn hm 0w20
That's where I would have gone...
Then 2 changes of (trying to cut back the VII a little bit with a shear stable mono)
3 qts Castrol 5W50
2 qts Castrol 0W40
1 qt Valvoline straight 50
3 qrts VR1 10W30
3 qrts M1 15W50
4 qrts MST 5W40
2 qrts M1 15W50
leaves you (if I've done the math OK, one 0W20 and 1 15W50)...mix them now for top offs...
Seriously, I'd do a Sasha Gray blend, mix them all in a bucket, so that they are all the same...