Conflict Looms - S7M3 - Air Assassinate a Grenadier - Option 2

So, sequence 7, mission 3, conflict looms. Some people were having trouble with my previous high risk method for completing this mission's optional objectives. And lo, I present a different method. Ledge assassinate the guy in the middle first, then head to the back of the ship. From a very specific place, ledge the lone guy, then either poison or stealth takedown the other two. Head to the front to take the guy by the wheel, and take the Grenadier from the ledge on the boat (the mast is a nightmare to climb)