ARAC ATTACK
Spider mission that can't be ghosted. I'm not even gonna try. Mission has tendency to put enemies right in your face without any chance to dodge them. Also it's hard to escape, because passages are blocked by cobwebs, which you need to cut. Also mission starts with "Body Discovery: 1" stat. It's because there are 2 fights between spiders and other enemies. First fight probably can be avoided as it is fight between 3 spiders and 3 haunts. Just jump into hole.
Second encounter is fight between 3 spiders and Mechanist, priest and bot. Bot is shooting skulls instead of cannonballs, so it can't be harmed by them. Mechanist may die in fight, but priest and bot will survive and it's impossible to dodge them. Plus there are 2 gems that must be collected and next passage is blocked by couple of cobwebs. And both enemies can go after you and enter passage.
Third encounter are couple of spiders including 2 fireball spiders. Because of torches near entrance and your lack of water arrows, they spot you immediately. Plus there are priest and bot behind you.
Fourth encounter are 3 spiders in narrow passage. Impossible to avoid. A bit after them is hole in ceiling. From there falls another spider and immediately attacks us.
Fifth encounter is egg room with couple spiders including 2 fireball spiders. Impossible to avoid. Plus you need to explode eggs, which is noisy and spawn couple more spiders. And also it bugs sound. For some reason, while in this room, I don't register enemies sound, ambient sound or any of my footsteps. Weird.
Sixth encounter is fight with queen. She must be killed. Being very close to her may look safe at first as her attacks go above us, but she spawns 20 fireball spiders all around her and 2 fireball spiders at the top. She can't be killed in 1 hit either. Strategy to beat her is to shoot arrow into her from the top and quickly back off. Kill 2 summoned spiders and then shoot queen to death. Of course all attacks alert other spiders.
Last encounter is at exit. It's well lighten and there are 2 fireball spiders that will spot you immediately.
GHOST: IMPOSSIBLE