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Efficiency Support - Tuning Stone | Diablo 4 Season 3

Efficiency Support is a Tuning Stone with the following effects:
When the supporting skill deals damage, you gain Critical Strike Chance to the same targets hit

I have yet to input rarity or tags for each stone!

Like all tuning stones, Efficiency Support can modify Governing Stones it's "compatible" with (see it's tags).

Up to six Tuning Stones can be used on a Seneschal Construct (3 for each Governing Stone).

Efficiency Support can be leveled up by obtaining DUPLICATE copies of itself.

Efficiency Support and all other Tuning Stones were released in Season 3.

Related Links & Other Information

In the meantime, Related Links:

Not much to say about these... I suppose the main one would be:
List of all Governing and Tuning Stones.