Wong's charts say to always hit (rather than stand) 12,13,14 regardless of the count since you have no information about the remaining number of sevens and eights - crucial bits of information.
This is the chart for when to stand on 15,16:
dealer
7 8 9 T A
player
15 9 7 5 0 8
16 10 10 8 4 10
Here are the numbers for LS (nothing is listed for an upcard of 7):
dealer
8 9 T A-s17 A-h17
player
17 ls
T-6,9-7 4 0 -2 -1 -4
8-8 7 1 4*
15 7 2 0 2 0
14 6 3 6 4
13 8
* = reverse meaning
Hopefully this is what you were looking for.
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