Composition Dependent
8 decks, dealer hits on soft 17, no double after split, late surrender against ten. Hose edge = about 0.7% (wizardofodds.com : -0.7892% + late surrender +0.07%)

7,8 > 10, hit= -0.500949
5,10 > 10, hit= -0.504049

I use composition dependent BS, flat bet on a CSM table,
7,8 > 10 ?
hit = -0.500949
surrender = -0.5, but will get -0.7% on a new hand.
Should I hit or surrender?