Two small features remove most repeat typing. Prompt snippets store the messages you send over and over; smart paste recognises what you just pasted and offers the obvious next step.
Type "/" at the start of an empty composer to open the snippet picker. Magnus ships with a few starters and you can save up to 50 of your own - anything from "Summarize this in three bullets" to a full briefing template. Manage them from the DATA tab of your profile.
Paste a URL and a chip offers "Summarize this page". Paste a long block of text (over ~500 characters) and chips offer to save it to Memory or turn it into a document. Paste or drag an image straight into the chat and it attaches to your message.