here's a crazy thought: take a weekend business select roundtrip for a few hundred bucks.
or call customer service and ask very politely for a free courtesy bump up to 110k. Once you tell them you've been busy exploiting a credit card signup loophole I'm sure they will be more than happy to do so.
Situations like this (99% earned using 2 credit card sign ups with no butt-in-seat flying or ticketed revenue to Southwest) WILL CAUSE the long standing companion pass program to end for everyone.