Hi,
This is the current Process that we are using in one of the project
1. I have an Epic with a Time spent field
2 I add Bugs, Dev Story and QA Story and log time under these issue type
==> I would like to add an Automation Rule that Sum up the time spent in all of Dev Story/QA Story and Bugs and add this time under the TIme Spent field in Epic
Note that: Epic is added as Parent to all of Bugs/Dev and QA Story
Thanks for your help