Most beneficial ability?

[Guardian of the Rain]

What's the ability/technique/jutsu/Kekkei Genkai with the most benefits?

I say it's between:
Sage Mode
Rinnegan
Edo Tensei
Using puppets
Using other people's powers like Kabuto

 

[Kazekage35]

Rinnegan, you can bring people back to life

 

[Prime Rib]

rinnegan or edo

 

[The Necromancer]

Making human puppets. You can make your body anything.

 

[Colonel Armstrong]

mitotic regeneration (tsunade got stabbed by three susanno swords and is still standing)
rinnegan
sage mode

 

[dominicansharingan]

Actually I think is Yang release, the mark that Tsunade has, and her healing techniques since you are pretty much a living Edo.

 

[Drakengard]

Well damn Edo Tensei could summon up somebody with a Rinnegan with the right preparations. Pretty handy I'd say

 

[Jukain]

Rinnegan.

 

[TheFifthMizukage]

Rinnegan duh.

 

[DarkLuxAng]

Rinnegan

 

[Kettei]

Edo and rinnegan.