BibLaTeX: Formatting parent entry when mincrossref-threshold is hit, Part II

If I have two incollections that are crossref-ed to the same collection, the collection-entry will be placed in the bibliography (mincrossref by default set at 2).

Would it be possible to shorten the collection-entry in the bibliography as soon as this threshold of mincrossref is hit?

documentclass{article}
usepackage{fontspec}
usepackage[style=authortitle-ibid,backend=biber]{biblatex}
bibliography{bib}

begin{filecontents}{bib.bib}
@collection{EickerWolf2017,
title = {Ungleichheit in Deutschland – ein »gehyptes Problem«?},
editor = {Eicker-Wolf, Kai and Truger, Achim},
location = {Marburg},
year = {2017},
}

@incollection{Schreiner2017,
author = {Schreiner, Patrick},
title = {Löhne und Verteilung},
crossref = {EickerWolf2017},
pages = {47--78},
}

@incollection{Bosch2017,
author = {Bosch, Gerhard and Kalina, Thorsten},
title = {Die deutsche Mittelschicht aus der Arbeitsmarktperspektive},
crossref = {EickerWolf2017},
pages = {111--142},
}
end{filecontents}

begin{document}
cite{Bosch2017}
cite{Schreiner2017}
printbibliography
end{document}

I would like to have the collection-entry remain the same if it is crossrefed once, but look something like the following when referenced twice to save some space:

In: Eicker-Wolf and Truger (2017: 111–142).

(With more than two editors, it would be »editor 1 (et al.)«)

Could somebody point me where to begin? This question suggests using ifentryinbib to define a conditional, but doesn’t actually give any instructions in formatting the desired entry.

documentclass[ngerman]{article}
usepackage{babel}
usepackage{csquotes}

usepackage[backend=biber, style=ext-authoryear-ibid, citexref=true]{biblatex}

usepackage{libertinus}

begin{filecontents}{jobname.bib}
@collection{EickerWolf2017,
  title    = {Ungleichheit in Deutschland – ein »gehyptes Problem«?},
  editor   = {Eicker-Wolf, Kai and Truger, Achim},
  location = {Marburg},
  year     = {2017},
}
@incollection{Schreiner2017,
  author   = {Schreiner, Patrick},
  title    = {Löhne und Verteilung},
  crossref = {EickerWolf2017},
  pages    = {47--78},
}
@incollection{Bosch2017,
  author   = {Bosch, Gerhard and Kalina, Thorsten},
  title    = {Die deutsche Mittelschicht aus der Arbeitsmarktperspektive},
  crossref = {EickerWolf2017},
  pages    = {111--142},
}
end{filecontents}
addbibresource{jobname.bib}

begin{document}
cite{Bosch2017,Schreiner2017}
printbibliography
end{document}