OptionPool.scp help

Guys, need help, when i try to make some changes into my optionpool i have a problem
if i use this:
[OptionPoolForce] OptPoolIdx ForceCode Wep2Ratio WepRation SuitRatio GloveRatio BootRatio HMetRatio
84 13 0 .0000 .0000 .0000 .0000 .0000 .0000
85 13 6 .0000 .0000 .0000 .0000 .0000 .0000
86 13 7 .0000 .0000 .0000 .0000 .0000 .0000
87 13 8 50.0000 50.0000 50.0000 50.0000 50.0000 50.0000
88 13 9 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000
89 13 10 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000
90 13 15 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000
i always get 50~50% MSA/SSA drop items, when i try to change any of those chances (.0000 or 50.0000), start to dropping drop 2 slots + 150%, skill exp +4,how can i set it to drop just MSA/SSA with a small chance? i mean, get one random msa/ssa after around X dropped items, i dont want another slot option, only msa/ssa. thanks
edit:
crossed my mind to leave that way and make the changes in worlddrop, less drop % in amp items and higher drop % in 0~2 slotted, what do you guys recommend me?