What's up bro. For number 4 you might forgot to add that you need to keep in mind the army capacity. The army capacity percentage decides how many troops is needed to gather the tile. For example if you're in war and you send out troops to gather it will automatically send out a lot more troops compare to if you're in gather-gear. So by switching midway can have an effect. If there is too much troops that's no problem but if it's the otherway around you might not clear the tile completely.
You're absolutely right but the point of the tip was just to show that the effect of your gear whether it be gathering or attacking doesn't matter until you land on the tile or the castle.