Have you considered being nice and supportive? Typing a quick "gj" when a teammate gets a kill? Supporting someone when your other teammates start flaming?
Especially when everyone's on edge at season's end, it's typically easier to win by morale than skill. Don't even try to keep the team positive, just delay the flame war for 5-10 minutes. Because the first team to degenerate into a mass of pissy whiny babies always loses, even with the biggest gold lead.
I love Wit's End, always have, but BORK is stronger in almost every situation.