The My Mods feature allows you to specify multiple download links. The Launcher will download and copy the files, in the listed order.
So if you wanted to include each one, you can copy and paste each github download links from each one into your My Mods Download.
If you wanted to remove one, you could just Edit your my mod to remove the links you didn't want.
Once you have something you like, and want to share, you can right click on your new My Mod, and select "Copy My Mod to Clipboard". This copies the XML string used to for it. Then you can use pastebin.com or textuploader.com, and paste it into a new document. Make some final tweaks on the name, and save it.
Then you can copy and paste the RAW URL for the pastebin or textuploader.com, and people can use that path in the "Open URL" feature, allowing people to play your combination.