So, if my read on this is right, these three rituals in conjunction allow for the creation of a weapon that will be capable of multiple spellstrikes of any earth spell (which can be made into a potion) and can be refilled, with a 3 count for each applied potion, until you run out of potions.Poison Cache (Item [Melee Weapon]) - A weapon with a Poison Cache Ritual may have an additional Contact Poison applied. The wielder may choose in which order any applied Contact Poisons will be used. Multiples of this ritual may exist on a weapon at the same time, allowing for larger numbers of Contact Poisons on the weapon at the same time.
Poison Trigger (Item [Melee Weapon]) - When a weapon with Poison Trigger has a Contact Poison applied, the wielder may choose on which weapon swing to release the Poison (instead of it automatically invoking on the next weapon swing). Once a character activates a Contact Poison, it is considered used even if the character stops swinging for its effect before it lands or resolves. This affects any Contact Poisons applied to the weapon.
Potion Coating (Item [Melee Weapon]) - The Potion Coating Ritual allows Earth Potions to be applied to the target weapon in exactly the same manner as a contact poison. These potions are delivered with the Spell qualifier. This Ritual may be combined with other Rituals as appropriate.
Is there something that I am missing that is preventing this?
Am I being too generous in my interpretation of “allows Earth Potions to be applied to the target weapon in exactly the same manner as a contact poison,” and how that phrasing interacts with the other two rituals?