Can we buff rengar's battle roar base Damage, but nerf it's ap ratio

A lot of AD champions have that one ability that will not benefit from any items in their build(aside from trinity i guess) because it scales of AP, which is the reason said abilities have a high base Damage since of most them are utility. Here are a few examples:

1. Riposte(fiora)
2. Equilibrium Strike(irelia)
3. Demacian Standard(jarvan)
4. Decoy(wukong) Every one of this abilities have a base Damage higher to 200 at Max rank, Battle roar on the other hand has a 170 base Damage on max rank which is very low by comparison, and i know the damage increases when you have ferocity charged up but when we use the empowered battle roar we used it for the heal not the Damage that is what we have empowered Q or E for.

So my balance ideas are to change Battle roar's Damage and ratio from: 50 / 80 / 110 / 140 / 170 (+ 80% AP) To 80/110/140/170/200 (+ 30% AP). while leaving the empowered version untouched. Lets be honest for a second, there is no one going AP jarvan or Irelia, or in this case AP rengar so there is no problem with lowering the Ap scaling. Battle roar's Damage feels lacking compared to other utility spells, and even tho this abilities are not used for their damage my point remains. Lastly my English is not the best, and please analyse what i said before commenting. thanks for listening.