How can I reduce or disable enemy respawns?
Once you complete certain quests in an area, the respawn of associated enemies drops considerably.
For example, in the Hinterlands, once you clear the mages' encampment, you no longer encounter mages, and once you clear the templars' encampment, you stop encountering templars. In the Hissing Wastes, there are only a few venatori camps that keep respawning after you destroy the main camp. Etc.