For a script that can generally delete pages fast, see AjaxDelete.
AjaxCommentDelete is a script that allows deletion of comments without leaving the article page comment is on by adding an "Ajax Delete" button to every comment. When clicked, the button opens a modal asking for entering a deletion reason.
Importing multiple scripts? This quick guide shows how to combine the imports.
For site-wide use, an administrator can add the line below to the wiki's MediaWiki:ImportJS page.
For personal use, add the code snippet below to your global.js page (for use on all wikis) or your common.js page on your wiki (for use on a single wiki). Note that personal JS must be enabled for your account.