About the bottle:
- Instant cast: You can throw it while moving.
- 15 second cooldown, doesn't start until bottle leaves your hand (~0.5s)
- 15 charges (with 30 trolls, you should be aiming to hit at least two per throw!)
- Burns for ~4 seconds when it hits the ground.
The range on the bottles is 30-100 yards. The further away the target area, the longer it takes:
- 30 yards: ~2 seconds
- 50 yards: ~3 seconds
- 75 yards: ~6 seconds
- 100 yards: ~7 seconds
Don't aim for groups of trolls, as they'll run out of the way by the time the bottle gets there.
This daily can take up to 6 minutes to complete, assuming you're only getting two trolls per throw, using all 15 charges, and you're aiming for medium-ranged trolls. It could take up to 10 minutes if you factor in travel time and waiting for trolls to respawn (doesn't take that long for them to come back).
To speed this daily up, you can:
- Throw the bottle, then pull them to where the fire is.As suggested by Truffles.
- Freeze them in place, then back away and throw. As suggested by StompahMage.
- Have a friend round them up and take a beating from them, then throw the bottle at
your friend the pile of trolls. (The trolls hit for ~120 before reduction.) As demonstrated by a DK in my guild.