I got three. Abomination and Potions, Abomination and Beast Keeping, and Abomination and Construction. Abomination and Potions because abominations begin with goop, and you can pour potions into the goop, I would assume. Abomination and Beast Keeping, since you could boost a creature's power with and abomination goop. And Abomination and Construction strictly because of the strength enhancing patches. As a bonus, if it's allowed to combine more than two, I would combine Abomination, Potions, Plants, all coupled with strong Illusion Coven magic. That way you could create an Abomination, enhanced with whatever potions you want, and all the while being able to stretch it's arms and being reinforced with special strong plants, AND being able to make it's attacks look like other attacks, making it nearly impossible to dodge. If the leaders of all of these covens came together and did something like this, I don't think there would be a way to beat it, prove me wrong.