The Epic Event of Cloaks has a lot of utility. The main one is being a threat to the enemy summoner and that it can quickly rush the game to a “kill or die” situation, but there are more uses than that. This event has no cost more than just the card, so don’t be afraid to use it to just position units in more convenient places, like Rustside Bandits in the middle of the lines to cover for you or having your Guild Machinist attack during your Move Phase and then bringing another Machinist over to be able to attack in the Move Phase also.

Out of Shadows is so versatile that you should almost always use both copies as long as you don’t obsess to get maximum value on every use.
Sometimes it can be the ultimate finisher, but sometimes it will just be there to help you organize your units into better positions and that's okay too.