Based on OP don't really see much value in additional requests with Discover, unless open to verification, which is imminent at or >25k.
If you continue to hit for luv be prepared for the possibility since are already in the zone.
+1 at least 1 more card, 2 more even better, diversity is King!
DCU EQ 5.0, Citi EQ 08 Bankcard, PenFed EX NG2
EX 08: AFCU, Amex, Chase, PSECU EX 98(?)
TU 08: Barclays, Discover
