Epic Battle Fantasy 5 NG+ A.C.E. part 72 Natalia Evil Boss Battle

In this episode, we face Natalia. Conventional healing is not available and your entire party is more vulnerable to fire and holy. And she spawns voodoo dolls for backup.
As long as your entire party is immune to dispel, you are fine. And as long as you keep stacking syphon on those dolls as well as stacking virus, weaken, tired, and curse on Natalia, you will be fine.
With More Foe Resistance enabled Natalia now has 200% resistance to thunder and ice, 50% resistance to bio, and -50% resistance to water, wind, and dark instead of -80%.
The 50% resistance to virus certainly makes the virus strategy less effective.