Guys, I have an amazing idea to solve all of this. Now, hear me out.
Just make me...the jinchuuriki of the ten tails.
jk, I don't want that...BUT, here's my idea: We let the bijuu "roam" as "themselves". And who do we let control the beasts? The people who are the current jinchuuriki. Who ever control the bijuu can do anything with it, like attack a village, defend a village, do nothing with it, etc.
Even though the beast can't die, the owner of the beast can lose the biju by having it die in battle or letting it become captured. So if a group of people were to kill a beast, the next time the beast were to resurrect, the person who delivered the killing blow will become the owner.
Now, if the beast were to enter battle, the owner can't be with the beast. It'll literally be the beast by itself. The beast can't have any allies be in the same battlefield as the beast.
Also, to adjust to the OPness (lol) of SL, I say we seriously buff the bijuu. Like, super duper frkn buff. Like, if you wanted to fight the bijuu, you have to go with a group. I don't care if you have 16 resets and 5 sharingans/rinnegans and passive senjutsu...you're going to die if you go it alone. It's that buffed. It's gonna be like a dungeon raid and the bijuu is hella OP. Like, the bijuu can seriously brush off attacks.
How do you kill/capture a bijuu and how does one gauge the strength of a bijuu?
Well, the bijuu have all the same strength. Meaning, they're all OP at the same level. Like, if the one tail were to fight the nine tail, they would be the same strength. Here's the difference.
To kill a bijuu, you must kill them equivalent to the amount of tails they have. So, back to the example: If the one and nine tail were to fight, they would be the same strength. But if the one tail were to die, that's it. But if the nine tails were to die, the one tail would have to be killed 8 more times.
I say we do this for just a year. It's something different to the norm and I think it's pretty cool.