Pretty easy tame with 2 people. Tanky dino with a good saddle helps. Giga/carch are tall enough to prevent rider from taking damage. Bring 5 carbo or similar tanky small dino (Stego and trike to large). Kite to a safeish location with a slope. Toss out the carbo a little bit away from the ossidon. Have your tribe mate take aggro with the tank suggest 30k hp with 70 plus Armour saddle. While you Trang. Jump on when its dazzed pick up the ice and carbo in the snowball rinse and repeat if lucky finish in 4 go on 1x.