You CAN use Wyvern eggs (tested with Fertelized Fire Wyvern eggs) and I play single player with the taming rate boosted to 2x, but one eggs gave 77% taming done. Another thing is to KEEP IT ON AGGRO, if it buries (which it will once it loses aggro or shortly after) it will start to lose taming progress slowly. Recommended dino is a Desmodus or Griffin, stay low, and dodge attacks, all the while keeping it right on top of the egg. This worked on my PS4 edition.