34567 w/ one draw to go in 2-7 TD

[SumZero]

How often do you pitch the 6 and how often do you pitch the 7 going in to the last draw?

Against 2 opponents that are both drawing 1 in front of you?

Against 2 opponets 1 of whom is drawing 1 the other of whom raised and is standing pat?

Against 2 opponetnts both of whom are pat?

OOP against 2 opponents who both drew 1 last time, 1 of whom raised?

I usually pitch the 6 b/c I want the extra 2-outs and often (in my game) rarely will 875 lose when 865 wins. But every now again against multiple opponents with strength I think to myself 87 no good and 2's are not a full effective 4 outs since they are way more likely to be dead. But I'm not yet comfortable with either draw.