Custom dependency graph

I have a large project with almost 400 tasks. The network view is not helpful at all since it shows every single task. Instead I would like to have a custom dependency graph where I can hide the subtasks and only show the groups and add dependencies between them.

Every time I remove a task from the network view it gets removed from the project. Is there any way to achieve this?

Found a solution, I filtered by groups and was able to form the dependencies that way

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