Disclaimer: This is a short answer and my personal opinion. Casual end game is about two things. 1) Cap your weekly tomestones (aka lore). No reason you can't run expert once a day. 2) Get your weekly lockouts done. For example, void ark & alexander. I view these two things as bare minimum to keep yourself competitive in gear. I also do daily beast tribe quests. Where things get a little more extensive is doing crafting and gathering red scripts and leveling up additional jobs. They are time consuming but totally doable with out a static. Once again, that is just my two cents.