The hard truth is that the game can't do that. I.E. in my bracket, having a 200+k would mean having a SWB with 8 people at most - 3 if you count only those who join everyday. 90% of the common players met during swb is composed by player who have 100-150k power.

As i have already suggested in a few other posts, what should be done is to give us a reason to hunt down winstreaks. As egoistical as it sound, i want my 20 refines and it's not worth to waste time to end WS, so i rarely target them before the last 5 minutes...