User blog comment:Stbk22/Possible Power up's/Techniques for then new group DxD/@comment-1884090-20150322231439

Vali is Amazingly powerfull but he is weaker then Issei in the sense he can maintain Emperio Juggernaut Overdrive for only a couple seconds where Issei can maintain it longer although still not perfect So he can either 1.continue doing training with Sun Wukong 2. the special event where all anime/light novel/manga characters get somehow stronger during battle by (love,excitement,lust,loss,annoyance etc.) 3.both

i think both but i also think there is more to it which i haven't quite though of it yet please share anything i might be missing or opinions