Just got approved for Sapphire Reserve at 0/24. If I want to add an auth user who's gonna be traveling for a while (thus needs a cc with no annual fee), should I add him as an AU on the reserve to get the benefit of 3x points travel/dining, or should I get a sapphire preferred for the 50K + 5K Auth user bonus? Just a note, the $75 annual fee for the Auth user on the sapphire reserve is not a factor, since he'd cover it (he needs to build credit anyway). Finally, what impact does adding a chase AU have on 5/24 for me, the primary acct holder? Thank you!