R.O. does the Blaster with Recon combo but can get a boost from Dutch's free TL to TL/F on each shot and still have a focus for defence.
You have to spend one of your two Foci to fire the Turret in the first place, so unless you find a third somewhere, you can't modify both the Blaster shot and you defense.
I goofed on that explanation. It should be have a Focus for the turret OR defence if the TL works to modify the shot to 3 hits/crits.