What would you do if you alerted the guards and send them coming after you? Throw a flashbomb and then hide and wait for them to forget about you? Or fight it out with them? Share your ideas!
For me, I'll always throw a Flash bomb and then hide in the darkness and wait for them to forget about me. Flash bombs are cheap and are efficient. They blind the enemy, allowing you to hide and indirectly allow you to retry getting past them without alerting them. But for me, I'll just get past them while they are being blinded or if I really hate them, kill them with fire arrows.
If throwing Flash bombs doesn't really help me in my situation,(which is almost never) I'll throw a gas bomb and knock the enemy out, which is what I like most, because you defeat your enemies, without leaving blood trails to alert the enemies' comrades. However, because I cannot bear to use Gas bombs, I use Moss arrows and Fire arrows more.