Same for me treevil tank did an awesome job!
I never thought it would be possible, but I ended up top 1% with my ragged crew of 3 and 4 star heroes lol.
Defense: got a straight A with 13/14 wins
Offense: Same as Defense, except Grimm+20 instead of LittleJohn. Got through with only 3 losses: 1 horribly bad board, 1 Mother North in top shape and 1 Alfrike faster than my treevil.
My teampower around 3.9k I also got lucky and didn´t face too many defenses above 4.6k or so and also some without Alfrikes
So I would blame my success at least partially on luck:
Not many bad boards against teams where I couldn´t come back from a bad start, I managed to come back from all but 1 bad starting board.
Not too many Alfrike teams
Not many really “good” defense teams, mostly what i faced were defenses based on heavy hitters +healers which I have little trouble with.
On defense I guess it worked because generally my team would be underestimated by everybody, people don´t even look at a team with 3.7 or 3.8k TP, they just click the fight button lol. If the attackers doesn´t bring both dispel and cleanse they´ll be in trouble.
Anyway it was big fun playing a 5 star tourney without 5 star heroes