I have a bit of confusion regarding entrance points using the UBZII. George C's 'play all counts' betting approach suggests moving to 2 units at a running count of 0. However, for 6 deck games, he notes that increasing bets at -15 after 1D; -12 after 2D; or -9 after 3D could add strength. I therefore assumed these counts as good points to enter shoes. BJAII Ch 9 suggests a first bet at -6 (at least for S17 DAS). Would -6 be a significantly superior entrance point? I am new to blackjack, so please pardon any ignorance in my question. Thanks for the help!

-MG