Ritual magic edge feedback wanted

[Ndreare]

This is an weird edge I created for the Nightbane game I am looking for feedback on. I think it could fit in multiple settings.

Ritual Magic
Requirements: Novice, Spellcasting d4+ or Occult d4+
Your character has learned to reach deep within and push more and more power into his spells to make them more powerful through deep arcane practice. The character need not be arcanely gifted to lead a ritual. The character may perform Rituals as dramatic tasks.
To perform a ritual requires the lead character to have this edge. The character may take advantage of up to Spirit in assistants each of whom must have the Occult skill and rolls Support (with no limit to the maximum support provided). When performing a Ritual the character uses Occult with the following modifiers, to perform must choose a base spell. The ritual then has the following modifiers;

• Requires 2 tokens in 5 or less rounds per rank of the highest level power in the Ritual. No more than 2 tokens can be gained per round.
• +0 Base casting time 1 hour per roll.
• -2 Casting time 15 minutes per roll.
• -4 Casting time 5 minutes per roll.
• -6 Casting time 1 minutes per roll.
• +1 Increase time +1 per step (2 hours, 4 hours, 8 hours, 2 days, 4 days, 1 week).
• -1 Per PPE costs of the spell not provided by the caster or assistants.
• -2 Per rank of the spell (-1 Novice, -2 Seasoned, -3 Veteran, -4 Heroic, -5 Legendary).
• -1 add an additional spell linked to the effect.

Note: No mater how many modifiers are used in the ritual, the penalty cannot be reduced below -2.

The advantage of using Rituals is in the right situation, the right skill and preparation Rituals can do nearly anything. The following adjustments can be used on a spell cast as a Ritual;

• +2 PPE to double the range of the spell.
• +2 PPE to make an instant spell have duration 5 rounds.
• +2 PPE to double the duration of a spell.
• +2 PPE to double area of effect of a spell.
• +4 PPE to increase the strength of a spell making it -2 to resist.
• +4 PPE to increase the die type damage of a spell (stackable).
• +4 PPE to increase Armor of a Spell by 2 (stackable).
• +4 PPE store spell for release an amount of time equal to the casting time of the ritual in the future. (The trigger for release must be declared at the time of casting.)
• +4 PPE double the amount of time a spell can be stored before being released.
• +2 PPE to add other minor effect the GM allows.
• +4 or more PPE to add other major effect the GM allows.
• X2 Final PPE cost. Can be targeted through a Thaumaturgically Sympathetic object. (GM arbitration)