Manipulation

[Ksenia]

I use Waste Not and Manipulation in the same 40 Durability synths all the time.

As long as you know what you are doing, Waste Not and Manipulation complement each other, they do not replace one another.

Congratulations, you found a use for it.
Most will use Masters Mend and get the same effect, though not over time.

It's still redundant.