Thank you for contacting us regarding the bug wherein Soa's targeting behavior is too random in the quest "Eternity Vault." Kindly be advised that this is a known bug. We regret we will be unable to provide you with further updates on this issue, but recommend checking future patch notes for any up to date information.
We would like to apologize for any inconvenience this may have caused, and to thank you again for the valuable feedback you have provided. Please do not hesitate to report any other issues you may encounter while playing.