I am using an old team but 100 % effective on level X.
GRE - blind, holy and random blue
G Lilith - class advantage immunity and life
Magus undead rescuer - holy, life and penetrating
Kari - 4 blues and 2 greens ( I use some randoms)

It is not optimized cause don't have time to test but does the job.
All full skillsharded.