Hitpoint tally: Tristan 29, Ilan 46, Deepwinter 7: 66 (subdual damage = 2), Diactum 22, Wulf 37
(Sneak attack damage: 12, Light Flail damage: 6, for a total of 18 damage. This leaves Tristan at 11 hitpoints)
The first slash hits Tristan in the thigh, despite trying to parry, dodge, get his shield in the way, the skill of the Bugbear is too great (Tristan takes 16 damage).
The second slash is more predictable, but Tristan also knows that the next slash will take him out;
Tristan is now at 13 hitpoints.