The best dino to tame this with is either a Galli with a bunch of health and stam or a flyer. Galli are extremely fast, they can outrun anything even Wyverns! Or raptors, flyers can each you higher then anything and you can dangle from them with a grappling hook and shoot at this giant beast. But be warned... torpor draining is on its side. Have fun taming this giant beast survivors!