biblatex: change inproceedings

I’d love to change the bibliography representation of @inproceedings. I use biblatex without biber (since I can’t get biber to work) and my bibliography definitions currently read as follows:

usepackage[style=alphabetic,maxbibnames=99,sorting=anyt,firstinits=true,url=false,doi=false]{biblatex}
    renewcommand*{newunitpunct}{addcommaspace}
    renewcommand{labelalphaothers}{}
    renewcommand{labelnamepunct}{addcolonspace}
    renewbibmacro{in:}{}
    DeclareFieldFormat*{journaltitle}{#1}
    DeclareFieldFormat*{title}{enquote{textsl{#1}}}
    DeclareFieldFormat*{volume}{textbf{#1}}
    renewbibmacro*{volume+number+eid}{printfield{volume}}
    AtEveryBibitem{clearfield{issn}} 

This pretty much worked for journals and books, but inproceedings do not look as I want them to. With a typical entry like:

@inproceedings{Wilis2001,
address = {Les Ulis, France},
author = {Wills, A.},
booktitle = {JDN 9 – Neutrons et Magn'{e}tisme},
doi = {10.1051/jp4:2001906},
file = {:D:/NP430 MasterThesis/Bibliography/2001_JDN9_Wills_Magnetic structures and their determination.pdf:pdf},
issn = {1155-4339},
pages = {133--158},
publisher = {EDP Sciences},
title = {{Magnetic structures and their determination using group theory}},
url = {http://www.edpsciences.org/10.1051/jp4:2001906},
year = {2001}
}

I get something like this:

A. Wills: "Magnetic structures and their determination using group theory", JDN 9 – Neutrons et Magnétisme, Les Ulis, France: EDP Sciences, 2001, pp. 133-158

1. Now first of all I wanted the year to be in parentheses, as it is done for journal articles. I tried DeclareFieldFormat[inproceedings]{year}{(#1)} but it didn’t change a thing.
2. And second, I would like to get rid of the publisher and address (or maybe only the address, I need to see what it gives…).
3. And while you’re at it, maybe you could also let me know how to suppress the month, that is printed for journal articles. Thanks.

———EDIT————-

Here is the MWE:

documentclass{book}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage[backend=biber,style=alphabetic,maxbibnames=99,sorting=anyt,firstinits=true,url=false,doi=false]{biblatex}
renewcommand*{newunitpunct}{addcommaspace}
renewcommand{labelalphaothers}{}
renewcommand{labelnamepunct}{addcolonspace}
renewbibmacro{in:}{}
DeclareFieldFormat*{journaltitle}{#1}
DeclareFieldFormat*{title}{enquote{textsl{#1}}}
DeclareFieldFormat*{volume}{textbf{#1}}
renewbibmacro*{volume+number+eid}{printfield{volume}}
AtEveryBibitem{clearfield{issn}}
DeclareFieldFormat[inproceedings]{booktitle}{Conference: #1}
DeclareFieldFormat[inproceedings]{date}{ifbibliography{mkbibparens{#1}}{#1}}

AtEveryBibitem{%
  ifentrytype{article}
    {clearfield{month}%
     clearfield{day}}
    {}%  
  ifentrytype{inproceedings}
    {clearlist{address}
     clearfield{month}
     }
    {}}

begin{filecontents}{jobname.bib}
@inproceedings{Wilis2001,
address = {Les Ulis, France},
author = {Wills, A.},
booktitle = {JDN 9 -- Neutrons et Magn'{e}tisme},
doi = {10.1051/jp4:2001906},
file = {:D:/NP430 MasterThesis/Bibliography/2001_JDN9_Wills_Magnetic structures and their determination.pdf:pdf},
issn = {1155-4339},
pages = {133--158},
month = {July},
publisher = {EDP Sciences},
title = {{Magnetic structures and their determination using group theory}},
url = {http://www.edpsciences.org/10.1051/jp4:2001906},
year = {2001}
}
end{filecontents}

addbibresource{jobname.bib}

begin{document}
nocite{*}
printbibliography
end{document}

As you can see, I managed to get biber to work (a simple update can work miracles…). But I still don’t access the year, even with

DeclareFieldFormat[inproceedings]{date}{ifbibliography{mkbibparens{#1}}{#1}}

Also I could get rid of the publisher and months with the suggested clearfields etc. but not the address…

DeclareFieldFormat[inproceedings]{date}{ifbibliography{mkbibparens{#1}}{#1}}

AtEveryBibitem{%
  ifentrytype{article}
    {clearfield{month}%
     clearfield{day}}
    {}%  
  ifentrytype{inproceedings}
    {clearlist{publisher}%
     clearlist{location}}
    {}}