If you live in a neighborhood, or don't have a place that something can macerate without the odor driving you nuts, boiling is your best bet. I just completed my 5th macerated head and it takes way less time than boiling. I have less than 1 hour of time per head in labor. Every bone detail is intact and the skulls look fantastic. I've boiled dozens over the years and this maceration process provides way better quality with less work. But I have a great place to macerate them now and did not before.
The results are clearly better with maceration and I have done scads of skulls, all kinds of ways... but there is no way I can do an ordinary size skull with just an hour worth of work, even if I am doing big bunches at a time.
Far better than boiling is just a plain old pressure washer.
