Mixing footcite with numerical citation style

I would like to use \footcite primarily when citing, but every now and then I want to refer to a reference as part of a sentence. These in-text references would ideally be formatted like Ref. [2,4-6,8], i.e. refer to an index in the numbered bibliography. (Please see below if reading this did not make much sense.)

Also, in the same way, I want to be able to do both in-text citations and footnote citations within footnotes; the latter then would then just create a new, subsequent footnote.

Currently, what I have is this:

\documentclass[12pt,english,a4paper]{article}
\usepackage[english]{babel}

\usepackage[
backend=biber,
citestyle=verbose,
bibstyle=verbose,
sorting=nyvt,
isbn=false,
url=false,
maxcitenames=10,
maxbibnames=100
]{biblatex}
\DeclareNameAlias{sortname}{last-first}
\renewbibmacro{in:}{}

\usepackage{fnpct}
\usepackage[multiple]{footmisc}

\usepackage{filecontents}
\begin{filecontents*}{bibliography.bib}
@article{A,
author    = {Alpha, Amber},
title     = {Title},
publisher = {Publisher},
year      = {2014},
}
@article{B,
author    = {Beta, Bryan},
title     = {Title2},
publisher = {Publisher2},
year      = {2015},
}
@article{G,
author    = {Gamma, Gina},
title     = {Title3},
publisher = {Publisher3},
year      = {2016},
}
@article{D,
author    = {Delta, Daniel},
title     = {Title4},
publisher = {Publisher4},
year      = {2017},
}
\end{filecontents*}

\begin{document}
While some\footcite{A}\footcite{B} argue X, Ref. \textcite{G} argues Y.%
\footnote{However, Z\footcite{D}\footcite{A} is has to be considered as an alternative,
even though Ref. \textcite{B}\textcite{G} dismiss this possibility.%
\footnote{A nested footnote.}}

\printbibliography
\end{document}


The result I get is this:

Not only do the citations not work the way I intended, but also the nested citation is not showing up. While footnotes-in-footnotes may be a bit off-topic, I hope the solution does not exhibit the same problem for footcites-in-footnotes.

What I would like to achieve is something like this:

I'm using LuaLaTex with TeX Live 2013, in the way it comes with Ubuntu 14.04.

I'd very much appreciate any hints. I'm rather new to LaTeX and BibLaTeX in particular, so I hope this is not something I overlooked when reading the documentation. Also, please let me know in case my question is unclear.

• See Footnote to a footnote and Footception: Footnote within a footnote within a footnote. What In seem to take away from this is that you can never have \footnote{lorem \footnote{ipsum}}. For the inner footnote you would need a new \footnoteA (or some \footnotemark/\footnotetext combination). For biblatex this could be automated. – moewe Apr 18 '15 at 5:40
• Let me know if you are interested in a solution that allows you to use two footnote levels with different counters and footnote marks (\footnote with arabic numbers and \footnoteA which can be nested inside a \footnote with alphabetic counters). – moewe Apr 18 '15 at 5:55
• @moewe: I'd be very thankful if you could explain how your proposed solution works, even if it does not fulfill all criteria! Thank you for the offer! – RQM Apr 18 '15 at 15:52
• @moewe: I don't want to be pushy, but here's a reminder that I'd still be interested in your suggestion, if you could find the time to write it down. Thanks! – RQM Apr 24 '15 at 12:40
• @moewe: I'd still be happy if you could quickly write up a quick (partial) solution. Thanks! – RQM Jun 29 '15 at 16:41