Dagon and Yuta have the same Barrier Technique and it’s not really something that helps in DE battles.

I’ve seen people do some impressive mental gymnastics saying something along the lines of “Dagon’s technique works like a hose he’s just focusing on them specifically while his technique still affected Maki”. If you focus the pressure of a hose on just one person that’s the same exact thing as being able to hit only one person. It’s literally the same thing. Just because Yuta’s attack doesn’t use obvious percentages doesn’t mean you can use mental gymnastics to pretend it’s not the same ability. 70% + 30%= 100%. That leaves 0% for Maki, in Dagon’s DE. And in Yuta’s Domain it was simply 100% for Sukuna, leaving 0% for Yuji. That shouldn’t need to be spoon fed to anyone.

Another argument I saw was using the Small Pox Deity as a reference which doesn’t work either. That DE is inherently different than Dagon’s and Yuta’s which themselves work exactly the same, it has this whole sequence to it. That’s one, it’s more of a distraction than an argument and two, it could actually just be the SMD (haha) using the focusing technique itself on a more automatic level.

The 3rd Slide shows that Dagon’s DE was actually working on Maki just like a regular DE before Dagon focused it which is important to note.

And the last point is that this same ability didn’t automatically allow Dagon to easily squash Megumi’s Incomplete DE. Megumi was able to fight against the DE for several chapters and if his Incomplete DE could do that with him simply staying put and using his sign then other characters with complete DEs should be able to fight just fine without needing to do any signs or anything. That argument never made sense. Why would people with complete DEs struggle like Megumi when his DE literally didn’t even have a barrier or a Sure Hit? All in all it’s not giving Yuta any significant advantages against completed DEs. Gege didn’t really give us an actual explanation as to how DE battles would go so making up fan fictions about who would win DE battles when we have no clue what actually makes a DE more refined in a battle, what role CE actually plays in a battle and we definitely don’t know what role compatibility plays in a DE battle.

Oh, and no, “Sukuna praised Yuta’s technique it doesn’t make sense for Dagon to have the same technique”, isn’t an argument either. Dagon did it on panel and that’s just a horrible argument in the first place. Had Sukuna been in Dagon’s Domain he’d have said the same thing, if not have praised Dagon even more since he was able to further divide the Sure Hits affect even further. This is just another thing Gege left unexplained and pretending to know what characters outside of Sukuna, Gojo and Kenjaku would win a DE battle is the equivalent of saying, “Gege told me in a dream”, because he certainly as hell didn’t tell you in the series.