There is a situation where I have never worked out the correct thing to do. For example, here is a sentence I just used in a comment on Stack Overflow:

The 'strong disagreement' was about using those methods in this (or indeed most) cases.

If (or indeed most) were removed from the sentence, it should read..

The 'strong disagreement' was about using those methods in this case.

However, if the bracketed part is left in, it just does not seem to 'read right' unless 'case' is plural, as in the first quoted text.

Is there a proper way to handle this?

If not, how could that first sentence be reworded, restructured or changed, to remove the problem?