Making parts of Horntail elementally-weak

Hello friends! Was wondering what you guys would think about the above suggestion. Responses with Pros and Cons invited!

Basically I'm suggesting making parts of Horntail elementally weak, as Heroes and DKs now benefit from the Horntail Head hit-box range buff, and they can cleave more, our Paladin friends would likely feel discriminated.

If Horntail is now changed to have a small elemental weakness damage-buff, it would not only invite more Paladins to hit harder as they shine in their single-target damage as a warrior, but it would invite more mages into Horntail runs as well (considering how Bishops are almost always essential anyway).

What do you think?
Disclaimer:- No I don't have a mage/paladin. This does not benefit me in any way.