You'll want a SCH and a COR to help out
SCH for Stormsurge bonuses (Use the augmented piece for STAT+9)
COR for Magic ACC roll and Refresh roll
SCH5/BRD1: 9 INT
Using Bison Steak: 6 INT
No Grimoire (Avoids potential book bonuses)
Target: W Ronfaure rabbits close to S Sandy entrance (INT=6)
Make sure no other multipliers are in effect (Weather/Dy/MAB/MDB/MB/Other crazy shit)
Goal: Flesh out potential modifiers from Attributes/HP/MP and possibly find how INT is modifying the spell
1. Cast and record the damage (SS preferable)
2. Add etudes for each attribute (STR > Cast > Wear off > DEX Cast) and record damage for each.
3. Add 1 INT and cast (See if the dmg you gain is proportional to the damage increase you received upon using the spell with INT etude). Record DMG.
4. Can probably add HP/MP and test to see if those affect the damage for thoroughness.
Some of this is excessive, but it's thorough for flushing out most factors
SCH6/BRD1: 10 INT
Using Galkan Sausage: 6 INT
No Grimoire (Avoids potential book bonuses)
Target: W Ronfaure rabbits close to S Sandy entrance (INT=6)
Make sure no other multipliers are in effect (Weather/Dy/MAB/MDB/MB/Other crazy shit)
Cast and record the damage (SS preferable)
Goal: Flesh out level's roll and (possibly) dark magic
1. Level into SCH6 rather than using the moogle unless you can keep your magic skill constant. If magic skill affects Kaustra damage, then you won't necessarily know whether skill or level is affecting your damage if you simply do the test as SCH6 with capped magic. Record DMG.
2. Now cast as SCH6 with capped magic skill for the level and see if you witness a change in damage. Record DMG.
Note that you may not see a change in damage, but that doesn't mean the variable has no effect! It may just be that flooring kills the possibility of the bonus you receive. If you only find INT to change the damage, try leveling up by 5s and see if Kaustra damage is consistent just based on changes in INT. If you find that numbers aren't adding up, then it's possible that skill or level is affecting the damage.