Killing skogres and zogres
|Tier 70+ melee weapon and armour|
Ring of duelling (8)
|Zogre Flesh Eaters|
|Inputs (4,779)||Outputs (564,720)|
1 × Ring of duelling (8) (4,779)
240 × Ogre coffin key (564,720)
The profit rate assumes 240 kills per hour. Your actual profits may be higher or lower depending on your speed.
Skogres and zogres can be found in Jiggig during and after the Zogre Flesh Eaters quest, and they always drop the ogre coffin keys that are used to loot ogre coffins. Since the bones from the coffins are quite valuable, the keys are valuable and skogres/zogres can be very worthwhile to kill.
They are level 56 and only have 2000 life points, but there's a hitch -- unless you're using the ogre composite bow and brutal arrows, your damage will be reduced to 25% of what it would normally be. Since the ogre bow is a low-level weapon and brutal arrows can be difficult to obtain, it's often better to accept the reduction in damage and fight them with high-level, non-specialised items. Both monsters are weak to fire spells, but this seems to only give a boost in accuracy -- and since the creatures are low-level, you should generally be hitting 100% of the time regardless. Using melee is not recommended as the zogres/skogres have a long death animation and it's worth it to kill one, walk over to it, attack another one from a distance, and pick up the key once it shows up.
You should do this on a populated world, as the location is nearly always empty, and on low-population worlds the six monsters in the main pen may not respawn in time. It should only take 10-20 seconds to kill one even with the damage penalty, so a full inventory might take 8-10 minutes. Banking is very quick at Castle Wars. After you've finished, sell your keys on the Grand Exchange, but keep in mind that as ogre coffin keys have a low buying limit, you may be able to sell them in bulk for a higher price.
Alternatively, you could loot coffins with the keys you've obtained. This is more efficient since it saves banking time and can even be used between monster respawns. See Money making guide/Looting ogre coffins for more information.