To be completely honest. It was super easy. Easier then i thought. Don't get off your flyer when the giga is not moving and not attacking anything just start surrounding it with metal dinosaur gateways and make sure it don't come out. Start tranqing it and after that just give it a 10x smoothing balm or sengiuene potion. Give it quetz kibbles 10 or more based on the lvl and just to be sure alot of narcos