Put shulkers on happy ghast

Hello! If we gonna use happy ghast for building, we would need more inventory spase, and since we couldn`t place blocks on ghast itself, why not to put it on it! Why shulkers? Becouse i think it would be cool if we can put 4 of them on ghast! So shulkers just for balance. Sorry if i got some issues in text, im not so good in english.