You misunderstood me. As a rule, Berserk and Enslave make sense to cast on 1-2 units, but they don't always move immediately after your hero. When casting Berserk, you definitely know whether the enemy hero will be able to remove it (or try to). With Enslave, due to the sharp drop in initiative, this is not so obvious. Often, Berserk is not removed from a dangerous unit in time, but Enslave is. But, of course, it all depends on the situation. If your opponent doesn't have Light magic, then it is very likely that Remove Curse will not work, even if they have it.