We do have performance data for poor braking.So you'll have to consider weigth,rwy length...and very important also the xwind.
Usually we take 93 as a minimum,but the book allowes you to land also on 92 rwys,if you are in the right ldg parameters.
One question though:
What you'll be your max xwind,on contaminated rwy ,slush >3mm,braking medium-they say-?
Ours is 5kt/10kt on ungrooved/grooved rwy.
But what will you do if xwind is,i.e. min+2kt?Hold for a while? What wind report you'll take? Actual from the twr,I guess?
Brgds Alex