Re: Slows target--does it stack?
One thing to watch out for is that "slows by xxx" can be reset by a lower level, if there are multiple applications of it from different targets. That is, suppose a character or a merc hits Baal with a Kelpie Snare, which has "slows by 75%." The slow effect to 25% speed will generally last a pretty long time. But if a character then hits Baal while equipped with Arachnid Mesh, which has "slows by 10%", then that will apply, and Baal will change from moving at 25% speed to 90% speed. It's kind of like a lower level BO overwriting a higher level one.
Another thing to mention just as an oddity: in 1.07, Kelpie Snare has listed "slows target by 100%" which does not freeze targets, so there is apparently some cap. The additional slow beyond 100% could potentially still be useful to extra fast or Fanatic targets, though, depending upon how things are checked.