The phrase "are most influential when" is correct and usable in written English.
It can be used to describe the conditions or situations in which something has the greatest impact or effect.
Example: "Leaders are most influential when they communicate a clear vision and inspire their team to work towards common goals."
Alternatives: "have the greatest impact when" or "are at their most effective when".
Our results showed commonalities with previous studies, which concluded the maximum allowable biomass and maximum annual net primary productivity specified for a species were most influential when predicting AGB.
"Fresh Off the Boat" is part of a larger movement within television, on shows that include the CW's "Jane the Virgin" and Fox's "Empire" — a trend that's most influential when it creates a hit, not a niche phenomenon.
"Fresh Off the Boat" is part of a larger movement within television, on shows that include the CW's "Jane the Virgin" and Fox's "Empire"—a trend that's most influential when it creates a hit, not a niche phenomenon.
As I've written about repeatedly, we're most influential when we combine credibility with vulnerability.
Information about what is normative was most influential when indicating what was "right" (i.e., "The right thing is to choose this").
Using this equation [45], we weight the instantaneous rate of accretion, so that the steeper portion the curve, is most influential when accounting for overall carbon.
Value-driven experiences are most influential on children when they have to "get their hands dirty".
On Friday morning, Twitter received the blessing of Oprah Winfrey, one of Middle America's most influential tastemakers, when Ms. Winfrey tapped out her inaugural message using the microblogging service as the cameras of her talk show cameras rolled.
The town's most influential club lady, when asked to join, said she really didn't think it was necessary.
I feel the way Jon Stewart -- America's most influential journalist -- did when he spoke at his alma mater, William & Mary.
