Staff Rushed To Save 33 Kids After Car Hit Daycare And Sparked Fire Pennsylvania Day E Center Kills 5 Children 4 Of Them Siblings

For staff in the sense of a body of employees, the plural is always staffs; Working as a member of the group of people employed by an organization or business. 例子： we have a full time nurse on staff.

Day care where fire killed 5 children wasn't inspected for smoke

Otherwise, both staffs and staves are acceptable, except in compounds;