Their little conversation had continued for hours. Kai and Xan wouldn't stop arguing at every point of the plan and make things difficult but no one really dared to stop them except Lun a few times. These two brothers were actually really scary.
After quite some time they had finally reached the conclusion that killing Mikain was their best option. It had to be fast and it had to happen quickly. Kai agreed to that immediately. First of all he wanted his brother out of there, he had enough problems, him being added to the pile was just gruesome. Second of all, freeing himself from the threat of the wolves reduced the groups that followed him by one and actually gave him the opportunity to think about what he wanted to do with the whole Philip situation.
So getting Mikain out of the way was their best option at the moment.