Herbal magicians are notoriously practical people. Since cone, stick and block incense burn at steady rates, such effects are impossible with their use. The advantages of combustible incense can outweigh its drawbacks, depending on circumstance. You could take out the censer, a charcoal block and the incense, light the charcoal, place it in the censer and sprinkle incense onto it. Or you could pull out a cone of money-drawing incense, light it, set it in the censer and get on with your ritual.
Different magicians prefer different types of incense.
I'm partial to raw or noncombustible incenses, but the wise magical herbalist stocks both types. Hence, instructions for the preparation of both forms appear here.