1st Encounters: All of the first encounters for Goblin are punch sequences. There are a few of them and they are all the same and extremely easy.
Final Encounter: Rotate around Goblin avoiding his attacks until he stops to take a breath. Circle around to his back and attack with . Lights will eventually turn off and you'll be above him. Get close enough to trigger the sequence. The next phase will have him using a pillar. Avoid it by dodging backwards, and when he does an overhead swing you need to rush behind him and attack his back again. There will be another takedown sequence when the lights go out. Now you will be facing Goblin along with several enemies. Hold the whole time, dodging them and Goblin. He will finish them all off as you attempt to get a few hits on him here and there. Once they are gone, keep fighting as normal. When he throws the pillar at you, stay away from him as he will use very damaging attacks and it's best to just avoid him. Eventually he will pick up another pillar, and you can finish him off using the previous method.