My advice is not to get within 10nm of them, at least not above the layer.
I've had the most success getting only as close to the escorts as I need to to take a shot at a capital ship (usually the Kuznetsov). Running the torps deep and enabling them as late as possible helps get the torps close to the target ships before they run.
There's also nothing wrong with using your first 4 torps to take out the 2 most threatening escorts, and using your second salvo to hit the real target. I'm sure it would feel cool to sneak right up behind those guys and stab them in the back, but I think discretion is the better part of valor in this scenario and that the last thing you want to risk is a close-range counterdetection with lots of ASROC shooters and helos around.
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