Spell Scaling Options: Shards, Intelligence, Caster Level

I would like an XML option to scale spell effect and duration by shards, intelligence stat or caster level.

Example:

• Arcane Arrow does damage equal to 50% of caster's Intelligence (i.e. a caster with Intel 20 does 10 points of damage)
• Arcane Arrow does 4+(+4 points per air shard) (i.e. a caster than controls 1 air shard does 8 points of damage)
• Arcane Arrow does 4 points of damage per caster level (i.e. a 5th level caster does 20 points of damage)

Example 2:

• Quicksand lasts for 1 turn +1 turn per earth shard
• Quicksand lasts for 1 turn per caster level

Example 3:

• Summon Dire Bear (3rd Level Spell) lasts for 1 turn per caster level
• Summon Dire Bear cast by a 3rd level caster would last for 3 turns
• Summon Dire Bear cast by a 5th level caster would last for 5 turns
• Summon Greater Air Elemental lasts for 2 turns + 2 turns per air shard
• Summon Greater Air Elemental lasts for 33% of the Casters Intelligence Level (rounded down); Intel 9 = 3 turns, Intel 12 = 4 turns....Intel 21 = 7 turns