Well seeing as every school is getting a mass prism for the next world, Balance is getting left out. So perhaps in the next world they could get something like this to make up for it?
Balance Prism Damage is altered to the opposite school. (Ex : Fire attacks with meteor on opponent with balance prism it is altered into ice damage. )
Tri-Prism Add 3 balance prisms to one opponent. (Ex : Hydra is used on opponent with tri-prism and the damage is converted into life myth and death.)
We're not getting any kind of prism in the next world, unfortunately. I'd rather have the Balance Prism you mentioned since Balance's main problem is an inability to convert Balance attacks when facing Balance monsters and having our arsenal reduced to only 2-3 attacks. I'm kinda disappointed we not only are not getting a prism, but we're getting Elemental and Spiritual Spears. Exactly what use is that spell to us?
balance doesnt rival any schools so it cant have a prism
That's not true at all. KI could choose from any other school, or have it be random. The issue is, balance v balance mobs/bosses without a prism is unfair.