User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-37165251-20181202115344/@comment-1605975-20181204073245

@Demonicjester01 True, Vali had stated that he wanted to become strong by relying only on his power and Albion's power. However, the next step in his development as a character might be setting aside that ideal in order to obtain more power to protect those important to him. Let's not forget that Melvazoa, a being stronger than Ophis and Great Red, will invade in 30 years, so both Ise and Vali need to exceed Dragon God level. With his current sources of power (his demonic power as a Lucifer and Albion's power), I can only see Vali reaching Dragon God level at best, hence why I think he needs to find an additional sorce of power like Ise with the 12 Heavenly Breasts.