These oversized toads are easy to tame. All you need is a bola, tranq arrows and meat to tame them. Their food drops faster than their torpor, so you won't need that much narcotics. Be careful not to tame one if there are others nearby.
Do not make the same mistake I did! When breeding these, they only mate on water and the egg will stay on the water and cannot be picked up. During maturation, do not put them on cryopod and throw them into land, they will instantly die.
Put this up to the list so first-time tamers would know.
100% melee damage is 20 base damage with beelzebufo sweep attack = 60 torpor over 10 secs. A second sweep attack within that 10 secs will only deal additional damage. 1000% melee damage will do 600 torpor over 10 secs with sweep attack :)