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Talking about the event buffs btw. 400 also makes sense because high metabolism is +100. Maybe devs just remove the plus sign next time because it's confusing some people lol and put a flat number: "400% produce points" "200% healing"

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9 months ago - /u/JagexDaze - Direct link

You figured it out but the reason we opted for the '+' approach rather than stating 400% outright is because for the majority of things in game there are additional buffs. While there are no other additive buffs for Livid Farm right now, it future proofs it in case we do add any.