I’d stay away from gain and compression settings unless you really feel competent at what you’re doing. I’d probably use NAL-NL2 instead of Signia’s proprietary, but there’s probably not much difference. If you’re not going to involve a professional, I’d say best bet would be to go with default settings for experienced users with appropriate dome settings. I don’t think you’re going to be able to do REM DIY.
Personally I started with 5-7khz and have worked down to 3.5-5khz and am pretty happy with it. Download Connexx Smart Connect for Android to turn your mobile device into a Smart Connect control center: The Connexx Smart Connect App allows you to control your Smart Connect & hearing. If you dropped high frequency gain because things were too noisy, you’d be chasing your tail. This is all based on the assumption that the aids are properly adjusted to begin with. This page provides download links for obtaining the latest versions of Tomcat 8.x software, as well as links to the archives of older releases. If that still wasn’t enough to get you some additional high frequency (“s” sound at about 6300hz is a good target), then I’d drop start frequency to 3.75khz and fmax to 5.75khz and repeat. Welcome to the Apache Tomcat 8.x software download page. If that’s not your style, I’d drop fmax to 6khz right away, and gradually work down to 5 or 5.25 khz.
(a quick google search of frequency lowering hearing aids will get you several excellent articles. Mine would be to read up frequency lowering. OK, I don’t know your approach to things.