I had to win five battles with Sneak. Although I did not win five strait, I believe, I did it in under 15 battles. And of course I used Life to do it.
Reward:
The building BBH continues as it is almost upto 100 HP of its own. Getting there, slow but sure. Pretty screen shot.
And of course the top five tokens holding for BBH today.
May the tip and Splinters be with you.