Hi
I need to create a filter where I can sort all tasks that are not
- Epics
- Linked to an Epic as a task (not issue to issue link but set as a task under Epic"
- Are subtasks of Epics
- Are subtasks of parent tasks that are linked to an Epic
I only have come this far:
issuetype != Epic AND "Epic Link" = EMPTY
All help is welcomed 
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Urmas