In a 1v1 or 2v1 situation with the bomb planted upper on de_nuke, is it wise to play inside of vents?
Personally I would never go in the vent in a 2v1. However, it could be very useful for a 1v1. You can sneak up the vent silently, hoping to catch someone off guard, or you can peek quickly hoping to beat someone off the reaction or flash and peek hoping to blind the opposing team. Lastly, you could go up and down the vent very quickly to get the defuser off the bomb, but hide quickly enough not to be shot. If you have your spams down, you can spam the defuser from the lower bombsite. If you're in a 2v1, it's very easy for one player to watch the vents and the other defuse, once they know you're in the vents. Also, if they know you're in the vents, its very easy to defuse without being spammed.