This means, for example: the kicking-distance is the range in which I can use kicks against my attacker (Distancefactor) or in which my attacker uses kicks against me. The other is, when the situation forces me to use kicks. It is very important that you know the advantages and disadvantages of all your instruments (kicks, hits, wrestling..) This gives you more efficiency.
There is nothing you can be sure of during a fight. So do physical cross-training. Kick, box, do close combat and wrestle. But make sure you ultimately consider the realityfilter. That’s why I often have to falsify a technique/strategy a little in order to make it more efficient.