One a reviewer can assess and a client cannot recognise: sector and scale instead of a name, real technical facts, the applicant's specific actions, the period and location of the work, and a named supervisor able to confirm it. Redacted originals are often less useful than a written description.
Test each sample twice
Read every example once as a reviewer, asking whether it shows anything the applicant personally did, and once as the client's counsel, asking whether the engagement is identifiable from the combination of sector, dates, and technical detail. Fix whichever test fails. Keep a private note of what was removed and who approved the wording, so the same decisions do not have to be argued again later.
Test every example twice before it enters the file: once as a reviewer, asking whether it shows anything the applicant personally did, and once as the client's counsel, asking whether the engagement is identifiable from the combination of sector, dates, and technical detail. Fix whichever test fails, and record which change was made for which reason. Keep a private note of what was removed and who approved the wording, held by a named person, so the same decisions are not argued again months later.
Where an example survives the second test only by becoming vague, it has stopped being evidence and should be replaced rather than kept for length. Three strong examples outperform ten thin ones.