We wanted to give everyone an update on battle regimens; once we have finalized the battle fixes and implemented jobs in patch 1.21, we will move forward with our plans to re-implement an optimized battle regimen system to go along with the battle system. Since combos have just recently been added, we will also be looking into the possibility of changing the battle regimen system.
Due to this, we are unable to provide any additional information or an implementation date, but we will be sure to let you know of any other information that comes our way.