[quote=@justTypical]
now this is more like it! Ok, so, hypothetically, would shouting to everyone about the two crossbow bandits be an entire action? Would I even be able to in time since I'm last in order?
[/quote]

Shouting is not an action. the other guys will need to make a Perception check to see if they can hear you and then perception check again (with advantage) to spot the crossbowmen.

Oh, also if you shout now it would be fine as it doesnt take much to yell. I will count that as what happens after you spotted them.