A Yutyrannus is by far one of the best ways to deal with these guys. You can easily scare these guys away from you. It also seems that when they are scared they can't activate their heal ability which makes it easier to pick them off. Another good method is to use a shotgun. It deals huge enough bursts of damage that they can be close to death in a few shots, good for if they show up unexpectedly while you're on your own.

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