These discussions of races should be accompanied not with liberty ratings, but district trend stats by voting history (R+14, D+8, R+3, D+20, etc) that show which party is dominant in the district or state. X+5 or less (winner gets <55% of the vote) indicates a competitive or toss-up seat. In my view, any trend showing X+6 or more indicates it's a X seat, especially if it's been true for a couple of election cycles. Then it all becomes a matter of high percentage math.
For "work within the GOP" folks, that means only pursue installing liberty Republicans in competitive +5 or less situations, or in R+6 or higher cases. The key here is avoiding wasted effort in trying to win or hold a seat as a Republican that is safely or strongly Democratic by history.
For "work independent of building within a major party" folks, that means only pursue installing liberty candidates in competitive/toss-up +5 or less situations, or in open seat primary situations in R+6/D+6 or higher cases. The key here is avoiding wasted effort in trying to win or hold a seat safely held by a non-liberty incumbent or either major party. Support a liberty candidate who runs for an open seat, in the primary of the dominant major party in the district/state (established by voting history).