The only good thing , if we compare to costume rigard, is the protection against aliments. Which indeed is why Grazul is considered good.
What pushes me back to consider aeron is the elemental Link. So poor atk boost . While Rigard gives 48%.
Thats why i tilted, because Aeron was totally outclassed . By the time i max one Aeron i can max two or three Rigard with costume bonus .
Its sad but i have to live with It , Aeron was powercreeped.