Donovan's sudden appearance wasn't the only problem Ashton had to think about. Unlike the rest of his genes that depended on him feeding on flesh and blood to level up, the werewolf genes levelled up by literally being in a battle.
He didn't need to kill someone to gain experience as a werewolf. He got experience by getting hit, dodging attacks and dealing damage. As a result, he was already on the verge of levelling up again. Thanks to the reckless beatings the mistress gave to him.
But that wasn't the problem. The problem came in the form of maintaining harmony between his genes. Lucifer had been quite clear in his instructions. All of the genes had to be within the 5 level range of each other. If not, then the harmony between the genes would get destroyed and as a result, one gene might overpower the others.
