Rdm is a great job adept at enfeebling monsters. Paralyze II/Slow II/blind II on a monster inhibits it to a fair degree.

However, high end NMs are completely immune to usually 1-3 of these important enfeebles, and extremely resistant to the rest to the degree that red mage's niche is not used. This is why rdm sucks, because SE made them useless on most monsters.