You can create a shortcut to Create Condensing Change. There, you have all control over what is condensed and how. What’s more: you can alt-click the signposts to copy paste them wherever you need.
So flutes, say can be condensed on page 1 (with system breaks defined), not on page 2–3, again on 4, etc., while clarinets have a different pattern, et al.?
You have absolute control. If you want to stop condensing on some instruments, create a condensing change, tick them, enable manual condensing and choose Stop condensing. They will follow this up to the next condensing change where condensing on those instruments will be reset.