The phrase "at best while" is not standard and may lead to confusion in written English.
It could be used in contexts where you want to express a limitation or a condition, but it requires careful construction to ensure clarity.
Example: "The project will be completed at best while we have the necessary resources available."
Alternatives: "at most during" or "at the very least while".
Stewart's accent is shaky at best while he fails to really convince as a grimy bigot.
Kim Jong-il prevaricated, the economic reforms that Kim Dae-jung had urged remained on paper at best, while millions of North Koreans remained short of food.
McCarthy and Grosek are third-liners at best, while Brown is viewed as a fifth or sixth defenseman in the long run.
Cultural programmes on TV and radio do a fun segment about games once a quarter at best while reserving discussion and analysis for interpretive dance or experimental opera.
Sales of film, developing and processing have been flat at best, while people have been buying digital cameras in computer stores.
He warns that the best individuals working in housing are considered "peripheral and interesting, at best", while major organisations such as Shelter have had their priorities influenced by "middle-aged direct debit signatories".
"Pompeii" stars "Game of Thrones'" Kit Harington as a Celtic gladiator in the doomed Roman city and Emily Browning as his noblewoman love interest, and Goldstein says they're "at best serviceable," while the dialogue is "frequently too basic".
Even when exhibiting portion control -- which most of us can admit isn't at our best while dining at the Thanksgiving table -- by some estimates, this meal contains about 1,800 mg of sodium.
Some 41% of businesses described knowledge of a foreign language as beneficial (so a majority is at best indifferent), while 28% thought language skills would help build relations with overseas contacts (so almost three-quarters felt they would not).
Deprived for so long of their captain, Michael Vaughan, and finest bowler, Simon Jones, England's Test performances were at best erratic while their one-day form had the burnish and purpose of a hastily assembled pub side.
Martin Wolf plainly does not think there is a serious risk either of a protracted global recession, which would make any export-led recovery triggered by a lower exchange rate at best anaemic, while deflationary pressures increased the real burden of our debt, or of a recovery accompanied by the rapid return of inflationary pressures, which a lower exchange rate would amplify alarmingly.
