Requirements
ANY weapon that has the critical potential (30%-50% would be preferable)
Acceleration Ring x ? (? refers to the number of users who can use Void Magic in battlefield)
All Arkstone x 1
Encounter ring x 1
Notice: This grinding method only gives max 1,111,000 exp or so per battle, if your training is slow, use some exp boosts acc. (Expert Mode)
1) Put the character with the critical weapon in front: First. In my case i put Litany in first place
2) Equip the acceleration ring on all players
3) Someone equip the encounter ring
4) Equip the player with the critical weapon, together with All Arkstone.
5) Go in battle, strike hard with your critical character. If your character manages to deal critical damage to all enemies, you've won.
6) If not, then spam "Quick Action" on Litany..using Izayoi and Noelle
7) Repeat until you won the battle...or you get owned by Metal monsters

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