Is Final Sting's damage relative to the Bee's health? Sometimes it hits for 2000, but other times they just pluck you for 700 before dying. The only discrepancy I can think of is that it scales based on their health (lower health, higher damage; full health, low damage). This is just speculation, but it seems to be consistent that high health bees do low damage and near-death bees one shot you.

I noticed this especially on the first boss because it seems like if the DPS don't actually attack the bees at all, they don't one-shot anyone with sting. I am starting to wonder if it is just better for DPS to focus burn the boss and just let the bees suicide on the tank at full health for little damage.