An analogue of doit.im with convenient collaboration?

Question

Task Management

Please let me know if anyone has experience with similar searches.
I went through more than a dozen services and settled on doit.im, because for me it is important:
1. Global goals (as containers for projects with their own parameters)
2. Tasks, subtasks, batch adding
3. Automatic division of tasks into "Today", "Tomorrow", "Someday", "Ideas".
But it is extremely inconvenient for him, for example, to work with one project together - you can only delegate a task, after which it starts hanging somewhere at the bottom of the main list.
We also need the interconnection of tasks so that until one is closed, the other does not become active.
I know about MyLifeOrganized, but I can't bring myself to get used to the cumbersome interface and manual synchronization.

Answer 1

If the number of project participants in the future is planned to be more than two, then it makes sense to look not at personal organizers, but at project management systems. Google to help you.