Hint - keep your bones and buy SMP (Small Mana Potions)

[zephyr1]

@Steve9999

If so, please can you confirm if having 4 maxed farms is enough food to research the harpoons, or is it necessary to convert one farm to an advanced farm first?

It’s not Farms you need to upgrade, it’s one of the Food Storage.

I covered this here:

@zephyr1

What Level Food Storages are required for Research of Giant Harpoons?

The Research for Giant Harpoons is 2771k, which requires all Food Storage to Level 20, and one converted to an Advanced Food Storage.

689k for Level 20 * 3 + 708k for Advanced Level 1 = 2775k.