I developed a custom form for a Content Type but it seems that I cannot have the files referenced outside my site collection so I included the file in the site Collection, Let's say know that I have to create three new site collections and use my CT with my custom forms. So everytime I do a change in the form I have to go to every site collection that has my CT and change the file.
Is there a better way to do this? I don't want to use a feature since I cannot use features in Office 365. What should I use or develop to achieve this?