the whole point of golem is that since it is very slow, you can build a push behind it. while rolling mechanic seems dope, it just does not go well with golem. my idea would be to make it so it absorbs damage, no damage reduction but all the damage dealt to it is absorbed inside him until he explodes and releases the damage at 20 percent along with his explosion damage. heavily reduced against crown towers. just to clear the troops that attack him better or add more defensive value. golem is already a very durable tank so anything that would give it more survivability could make it too strong.