VETERAN INSTINCTS. Seriously, Echo HAS to have Veteran Instincts, he absolutely needs to shoot first with ACD.
Vader + Decoy is how the OP is planning to boost Echo to PS9--which is better than PS6+VI. I think Echo + Outmaneuver/Predator, with Decoy on Vader, is at least an interesting plan for outmatching Falcons, and I don't know if it will work but I'd like to see someone try it.
Not exactly.
Decoy/Swarm Tactic is how the OP planned to boost Echo's SHOOTING to PS 9 which, I'll grant you, is better than the PS 8 you get with Echo +VI. Echo is still maneuvering as a PS 6 instead of as a PS 9. Maybe one never faces any pilots in that PS 6-8 range where having VI can make a difference but when one does that difference can be huge.
Now getting a Phantom, not just Echo, Predator/Outmaneuver and shooting at PS 9 may be part of a plan for dealing with Han Solo but it has it's drawbacks. It still couldn't "one shot" the Falcon. Even if shooting against 6 defense dice it is still possible that Han could "one shot" a cloaked Phantom and "just getting hit" is still likely. The points you are spending to shoot at PS 9 will be overkill on many targets. Those reasons all ignore that a late moving Echo can often dodge arcs and avoid many of those issues against ships other than Han.
I feel like with Stay on Target giving more ships Phantom like maneuverability, HSF will be even more ubiquitous than it currenlty is. Checking the regional results thread for my local area showed mostly yt-1300s. I know it sucks to get into a shot for shot war with a falcon, but I can't get out of its arc and Echo would be my highest attack ship. If I can focus Han down with my ships even if Echo dies I think I am better off agaist the remaining escorts.