User blog comment:B214/Question and Answers 3/@comment-24098614-20140920095237/@comment-1359322-20140920231517

"[Yeah, this is final trick and the forbidden attack the Boosted Gear has. The particles of dream we were able to turn into reality because we were able to have a mutual understanding with Albion. —It’s the Longinus Smasher!]"

The White Wyvern was unlocked through understanding with Albion, and the Red Wyvern was unlocked through understanding with the past DD possessors. If Issei could unlocked the Longinus Smasher without the Wyvern, Ddraig wouldn't have mentioned Albion in that mix.

I'll admit on the beast girl part, but Yubelluna is more to technique-type than power, she did take out Koneko, Yuuto and Akeno, but she only took out one of them. She had the chance to eliminate Issei and Koneko at the same time but she only eliminated one, same again with Issei and Yuuto, you can say it's because Issei is MC, but then again, it also requires Yubelluna to be skillful enough to specifically take out only one along with a lack of destructive powers like Akeno or Rias though. >___>

As to technique type, they are more to those that uses minimal effort to gain the best result and can use their opponent's strength to counter them. So you're right that Cao Cao, Yuuto and Sona are technique types. And if you see Sirzechs and Ajuka, who are also technique type, you'll notice the decisive point why i say Rias' team doesn't have any technique types. Sirzechs and Ajuka both fought easily without showing any signs of unnecessary movement, they control their power to the point where they could use the highest destructive attack with minimal movement (or literally no movement), Most of Rias' members on the other hand couldn't have done that. They plainly focuses on attack power only, that's why most of them get exhausted easily as you can see most of the time with Issei. Of course that can be overcome with training but compared to Sirzechs or Ajuka, Issei would most probably be focusing on increasing his stamina rather than control of power. Also the control of power Sun Wukong mentioned won't make Issei a technique type, it's just a basic skill of combat where you control your power to reduce wasting unnecessary energy. If you want to make Issei a technique type, he'll need to at least be able to touch Yuuto's basic level of technique first.