The magickal properties of herbs are the reason for choosing them for use in a non-combustible incense, more so than their scent. Not all magickal incenses smell good. The purpose of magickal incense is to invoke the specific energies and powers of the herbs, not necessarily to please your nose. So, choose your herbs for their magickal properties. For instance, Frankincense is used for protection, spirituality, love, and to consecrate and purify.
Myrrh is useful for healing, peace, and meditation.
Copal is burned for cleansing, purification and protection. Bay is good for purification and for sharpening psychic powers. Cinnamon is another one for amplifying psychic powers, for drawing money, to speed healing and to strengthen love. Pine is burned to draw money and for exorcism, juniper for protection, healing and love. Sandalwood is an excellent base for nearly all incenses, as its scent is light and its properties are protection, healing, exorcism, and spirituality.