Few basic questions from a noob

Hi guys, I'm sorry if the answers for these I easy to find but I was wondering about the following questions:

• How many villagers are able to gut a sheep/deer/boar?
• Same idea but for stone and gold, is it the same number? They look bigger than animals to me
• How to make sure villagers only kill one sheep at a time?
• In case a villager kill a second sheep, what's the best strategy to lessen the waste? Split your sheperds in two groups to avoid as much decay as possible?
• What's the consensus about fishing (with vills?) and hunting deer? Sometimes it seems quite slow compared to just using farms after using up boars/berries so I just skip it. Dunno if it is a noob move but building mills just seem so wasteful
• Are there any actual purpose for patrolling and military formations?
• When to get eco technologies? Are some of them just not worth getting?
• Same kind of idea but what technologies are actually over/underrated? I'm used to research murder holes ASAP for example but I've heard it's actually not all that good
• How to use militia? They get killed by villagers so easily I don't even bother making them but I've been defeated by drushes so they must have some purpose
• How many TCs/mills per farm?

I'm sure I'm forgetting some but it's quite a lot already!