okay...punctuation might help a bit, so could a little spelling. I dont want to be a perfectionist, but there were several bits of punctuation that were missing completely and made this a hard post to read.
You do have some good content in there, but you need to bring it out a bit more to make your point. You can trap mobs without SS, so why do you make it a point to include it? How does SS make this easier? And it is interrupting the caster that you are doing, the other method you speak of is called LOSing the caster.