@ownedbycats - I keep Magazines, Journals etc in a separate physical library. In terms of what goes where; the following, which is similar to yours, works for me:
I put Publication Name into Author, and Issue <identifier> into Title. What goes into Title varies by Publication - for some it's date based (e.g. 2008-01, 2017-Q2), for others it's issue number, or in one case Folio number/issue number. Basically what ever is needed to differentiate the issues of a Magazine or Journal.
Publisher and Publication Date go where you'd expect. I don't make use of the Series column. I have a custom long text column for Contents -- I don't use the Comments column because it cannot be edited from the book list.
For this library I have the Author and Title sort tweaks set to copy and strictly_alphabetic.
BR
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