[SmG Icemon]

Depends on the weapons of the enemy and your weapons, as well as your nades

If you're outnumbered and you're hoping to retake site and defuse the bomb, then better have at least a flash or two and a smoke, or you won't get very far unless it's very low ELO.

Also depends on the time, if 20 seconds has already passed you'd have to kill 1-2+ people and defuse the bomb, or retake in a way that they can't stop you from defusing.

Finally, if you don't have anything of value on you, trying may be better than not trying, but if you have a rifle, full armor and nades it's usually just better to save and let it explode.