Moreover, with that -1 to PE and -3 to LK (which would still let You have Better Crits) You would earn 4 S.P.E.C.I.A.L points which You could add to IN which would let You take BRoF (instead of action boy probably). Thats just things to consider.
Differences (my calculations) between 7 and 10 LK based on
this unconfirmed crits table are below:
Crit chances 2x MC + 7 LK:
base: 23%
body parts:
eyes = (23+0.88*60) = 75,8
head = (23+0.88*40) = 58,2
arms = (23+0.88*30) = 49,4
groin = (23+0.88*30) = 49,4
legs = (23+0.88*20) = 40,6
torso = (23+0.88*0) = 23
Crit chances 2x MC + 10 LK:
base: 26%
body parts:
eyes = (26+1*60) = 86
head = (26+1*40) = 66
arms = (26+1*30) = 56
groin = (26+1*30) = 56
legs = (26+1*20) = 46
torso = (26+1*0) = 26
Crit chances 2x MC + 7 LK + Mms impl. + Glow:
base: 30%
body parts:
eyes = (30+0.88*60) = 82,8
head = (30+0.88*40) = 65,2
arms = (30+0.88*30) = 56,4
groin = (30+0.88*30) = 56,4
legs = (30+0.88*20) = 47,6
torso = (30+0.88*0) = 30
Crit chances 2x MC + 10 LK + Mms impl. + Glow:
base: 33%
body parts:
eyes = (33+1*60) = 93
head = (33+1*40) = 73
arms = (33+1*30) = 63
groin = (33+1*30) = 63
legs = (33+1*20) = 53
torso = (33+1*0) = 33