I need to type a regular lowercase i and a barred-i with a tilde above the i's dot, like these:
When I do this in Word (using v 16.16.11 for Mac), when it combines the accent mark with the letter 'i', it replaces the i's dot with the accent mark, thus:
The combined unicode character for regular i is U+0129. I have typed these using the character viewer. I have the phonetic alphabet and IPA fonts installed. The combining tilde is U+0303, barred i is U+0268.
(I know my desired result looks terrible, but I am writing about a language in which lower case i and small-caps ɪ are both used, and it is crucial to distinguish between them. The dotless versions look too close to a small caps ɪ.)