At this point. Are summonings even useful anymore?
You know , I think the Tailed Beasts and Boss Summons have the potential to become very powerful. Imagine a Gambutana with Sage Mode+ Rasengan + Shadow Clone? Or maybe a Gamahiro with the 8 Gates + Tsunade medical ninjutsu?
Dude, imagine Shukaku with Clones and FTG? Moves like "1000 Tailed Beast Bomb Barrage" can easily become a reality. Or maybe the Sanbi with Tobirama's Skill with Water Ninjutsu? If all the tailed beasts had Kage Level Ninja Skills , I believe that the Jubbi would be nuked to pieces , Madara and Kaguya would be stomped on like crazy.
Or how about a Tailed Beast with a Sharingan and a Rinnegan? I am pretty sure that Orochimaru can achieve this creation of Gigantic overpowered eyeballs with Sasuke's and Naruto's help.
Any tailed beast or Giant Summon with Ninja skills that are on the level of a Jonnin is frankly frightening. But I noticed that most tailed beast or boss summons have little to no ninja skill. They are just usually just big with large firepower and so hard to defeat.