Waxing Moon: (time between the New Moon to the Full Moon) is ideal for spellcraft which will draw energies to you.

Full Moon: most powerful time to spellcraft.

Waning Moon: (time between the Full Moon to the New Moon): time for study, relaxation, only banishment spells are performed during this time.

New Moon: least powerful time to spellcraft. Though there are some who believe that dark forces are abundant under a New Moon, and dark magic can be performed under this phase.