Rhenny
Adventurer
Why can't monsters and PCs just ready attacks to deal with this? If all the PCs are hiding around a corner, then all the kobolds ready an action to shoot at the first PC who comes around to attack.
Likewise, the PCs can ready attacks to kill kobolds who move next to them. This should end a kobold karousel pretty fast.
Yes. That is the smart choice. Since the pop out attacker won't be able to see the foes out of his turn, he will get a nasty surprise when 10 arrows fly at him the next time he pops out.