Looking for help with some fine-tuning.

I want to accomplish 2 things, find adjustments to achieve (within the settings of the RaceME Ultra) best economy and better exhaust brake performance,
(later some performance tuning).

I have custom tunes, including a transmission tune, installed.

1st of all, should I leave everything the way it is?

My exhaust brake does not seem to function as well after installing a new turbo and having a shift kit installed, (with custom trans tune).
When I say my exhaust brake exhaust brake does not seem to work as well, before it use to work going down to about 40km, now it stop working
sooner.

What kind of manual programming do I have to be careful about, so as to avoid any damage for more advanced performance tuning?

The shift kit runs pretty well; I am keeping the HP tunes down to 30 or 60 HP right now. (I have not upgraded my head studs yet).

( 2016 / RAM)

Note: The new turbo is 1045771 BD Diesel Screamer Performance HE300VG Turbo Charger - Dodge 2013-2018 I have a BD shift Kit installed.