Original Post — Direct link

It takes 11 ticks to throw an eternal magic log on a bonfire, while any other log takes 6 ticks. That makes it less xp/h than regular magic logs, which costs about 4x less gp.

Easy fix, just change it to be 6 ticks like any other log, will still be very far from the best xp/h for firemaking.

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There's some good points touched on by other comments on XP balancing but this sounds like a bug. I've asked one of our QA to investigate and get a ticket in for this :)