|371,000 per hour|
The profit rate assumes 20 kills per hour. Your actual profit may be higher or lower depending on your speed.
Before heading to the King Black Dragon Lair, log into a free world before venturing out into the Wilderness. Stand outside of the fenced lesser demon area, and log out. If possible, have your scout assess the risks. After finding an empty and safe members' world, return back on your main account, and enter the lair.
The King Black Dragon will hit 0-10 with his special dragonbreath regardless of dragonfire shielding and Prayer. By doing so, Defence bonuses become useless, so your gear should focus extensively on offensive and/or Prayer stats, concentrating on both Attack and Strength if using Melee or on Ranged bonuses if using Ranged. Prayer may also be used to speed up kills on both ends.
When he freezes you, use this time to heal by eating a couple pieces of food at the most, and try not to consistently fall below 40 Hitpoints during battle. Check your stats when he shocks you, and boost them if low.
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