The starting point for left-hand rootless voicings on blues progressions is to play two-note voicings that provide the 3rd and 7th of each chord. In a I IV V blues progression as shown below, each chord's voicing will be within a half- or whole-step from the other voicings. Close, or stepwise voice leading from one chord to another provides good flow or connectedness when playing chord progressions. Also note that for dominant 7th chord types, the 3rd and 7th chord tones form the interval of a tritone. The example below uses a simple form of the blues progression.
This example uses a more robust blues progression with some secondary dominants added, but chord voicings are still two notes and use the 3rds and 7ths of the chords.