HR3 > guild quest > Kushala Daora > Town

this is in the town, but its color is diff and its movement as well.
what approach should be done here?

This is the rusted version before it sheds it's skin, you have options like gathering bolts at the base camp and shooting at it then finishing the job with your weapon, range players have an advantage of safety here but it takes hell long to take this bad boy down...The dragonator can be activated at the main gates at the top.
This quest is a little long solo but you should be able to manage once you ge weapons with kick ass dragon elements..*cough* eternal eradicater* cough*