Please note: all credit goes to Deucy!
This guide is going to talk about the strategies that I personally used to S-Rank “Monkey Business”.
Guide to S-Rank Monkey Business
Level 5 speed boost is recommended to S-Rank this level in the easiest way possible. You can get the speed boost ability by completing “Monkey Business”.
Any level of Telepathy should work fine. This power is not as helpful as the other ones listed, but still useful. You can acquire telepathy by beating “Deadly Decadence”.
Primal 5 primal fear is recommended to S-Rank this level in the easiest way possible. You can get primal fear by completing “Stranger Sewers”
I would recommend by getting all outside shards first and then go back in to the middle to get the rest of the shards. When you’re going back to the middle, use telepathy to be able to make sure that you don’t run into any monkeys. Make sure you have your sound on to be able to detect where the monkeys are coming from. If you feel that you are in danger or getting cornered, use primal fear for an easy escape.
This is a youtube video to help you find all of the secrets: