Personally I wish Freeze granted Umbral Ice 3 and worked kinda like Flaming Arrow so it can be on par with Flare. I would really like to see Ultima on Black Mages work as a single target spell. Also Burst work as a thundercloud proc that works as a target AoE. Demi and Gravity can work for Black Mages yet they probably shouldn't work as % damage but more of damage with utility.

As for Summoners wish Ruin 2 should be reworked to be more like Lightnings Ruinga. Summoners will really benefit from spells like doom, death, and hell mist since it works with their design that revolves around DoTs.

Yet that's just my opinion on this.