Cert Question

Good morning! Need a little advice as to which direction I should choose when it comes to certifications. My current position now is a RH Linux Administrator, and have been in the position for about 4 months. We are currently running RHEL 6.8 VM's, with no plans to moving to RHEL 7 no time soon based off customer satisfaction with RHEL 6. With that being said which cert should I try to go for, seeing how RHCSA 6 is now obsolete? The only certs that I have in relation to my position is Linux +. Any help would be appreciated.