Locator Attachments or a Bar?

Charles, a dentist asks us:

I have a patient who had four 4x10mm dental implants placed in her mandibular anterior. I was planning on doing Locators and making an overdenture.

The gingival connective tissue over the dental implants is very dense and
thick. From the implant platform to the highest point on the
surrounding gingival is 4mm for each dental implant. This means the Locator
abutments are going to have to be taller than I planned and this will
create longer lever arms that will apply more force to the dental implants.
Should I still go ahead with the Locators or should I change the
treatment plan to a bar? Thanks.