Other thing red magic could have is what I liked to call "battlefield alteration spells".

For example, gravity wouldn´t be an attacl, but rather it will create a zone where projectiles are usseles and movement is slow down or right awy imposibble. An anti magic zone spell too will be nice or a "berserker" zone, where player characters lose HP but gain an stat improvement, or a zone wich make all kind of attacks usseless but drain totally the MP and TP of the user, and there are even a lot more posibilities for spells.

The only problem is, that enemies should be remade to give them more skills and differents attacks, so new and different strategy are needed. One hit kill skill wich need the use of Red Magic special uses, long ranged and magical enemies, and even enemies which act like red mages, altering the battle in deifferents ways, being the red mages the only ones who can reverse its effects.