Back when those spells generated more enmity, Red Mage was a great tank for things that an absolute minimum number of people engaged or that the tank didn't engage for some reason. Against things that could be hit with things normally, there were far better options.
Other than stuff that is super-tanked by Paladins, I can't think of anything today that the tank doesn't engage other than the same level 75 content that is much easier now. So, I doubt changing the enmity of those spells back would actually change anything.