This solution does nothing but mess over the mid range powers.
The problem right now is those that are Top power- run around & click everyone but try & avoid those that are within their own range because it's about "Time" for them.
The mid range powers avoid the Top powers like the plague, while running around trying to find the bottom powers.
Everyone is basically trying to * on a low power- making win streaks valuable when they're already valuable just forces Top powers to camp Mid range Powers to earn the streaks they've gained & then what do Mid range powers do? It answers itself.
The top powers still win- while everyone else loses, the solution is in making the rewards a "Field based" reward, like how it is now when your field wins you get an extra 250 or so Sun Scrolls & a seal scroll. It should be like that but the whole field wins 4-5 Refine runes & the top places don't get a 1st/2nd/3rd reward. If you want fairness & balance, that's how it needs to be.
That way, the 2nd place field all gets 3 refines & 3rd place field gets 1-2 refines- this incentiveses everyone to at least participate for their "Field" and encourages people to actually win/play for their team & not "for themselves" it's a psychological aspect that people can "get behind" that will work, when it's every man for themselves the negative aspect has already been established, everyone wants to win.
How SWB is obvious but just in case, how it actually works- there are 3 fields, but those 3 fields ARE NOT actually competing, you're actually competing with the players in your OWN field, the play is getting 1st/2nd or 3rd, in your field therefore realistically you're competing with your own field to win, you don't actually care about the other fields.
Remember in a game like this, there will Always be a Loser.