Loading a plugin after WPML (or any plugin)

I am creating an admin panel plugin that requires wpml to be loaded at first, so that I would use the $sitepress object (specifically, the active languages list, and the retrieval of the translated items).

The problem I have is that I can’t find a proper documentation on how to do it. I’ve seen the method with the option active_plugins but when I use that to bring my plugin as the last of the array, it says it “cannot re-instantiate” (true, it must have been loaded before).

So what is the catch? How can this be achieved?