User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170412031517

I'm pretty sure I figured out why Issei is considered the weakest Red Dragon Emperor in all of history. He's top notch in evolving the Boosted Gear in unique and different ways, but when it came to the original power of the Boosted Gear, he was lacking. After Issei achieved Balance Brekaer, he was meant to go Juggernaut Drive and destroy himself with it like the other possessors. That was the zenith of the Boosted Gear. The Red Dragon Emperor's power lies in domination as we've seen in the chant for the Juggernaut Drive for the Boosted Gear. Issei strayed from that path and went down a different one. The reason why Issei is considered the weakest Red Dragon Emperor in history is because his own nature conflicts with the original nature of the Red Dragon Emperor. So that's why I believe when it came to the Boosted Gear and his Balance Breaker, he was lacking compared to the others. He was powerful but we have to remember that the Boosted Gear is a Longinus and is already OP as it is. The Illegal Move: Triana and Cardinal Crimson Promotion were Issei's own powers, not those of the Boosted Gear. That's why he's considered the weakest Red Dragon Emperor in history with Issei going down the path of righteousness while the Red Dragon Emperor is supposed to follow the path of domination. Now he's the best.

Now take Vali. Vali is considered the strongest White Dragon Emperor because his nature fits perfectly. The White Dragon Emperor is supposed to go down the path of supremacy. Vali is a battle maniac and wants to fight the strongest existences and stand at the top becoming a superior existence. But instead of falling prey to the power like the past possessors, he controlled it and came out on top proving himself superior. He went down the usual way of the White Dragon Emperor although he didn't destroy himself like the others and used his demonic powers to get stronger and become superior to the past White Dragon Emperors and actually managed to seal off their conciousness.