The problem with Whisper + VI + ACD is that it is an extremely mobile ship, with extremely high Agility except for an extremely narrow window.
How do we fight this?
If Whisper can be attacked in that window, she's quite vulnerable.
This requires high Pilot Skill
- High PS is being achieved through Veteran's Instinct on naturally high PS pilots with extra-normal firing arcs. Han, Chiraneau, and Dash, specifically, as they can keep her in their turrets.
- High PS could also be achieved through Roark Garnet.
This requires either an attack with no blind-spot, or sufficient mobility to catch up to Whisper after decloaking.
- Turrets obviously exist, and are the go-to option.
- Anyone of PS 9 could become mobile enough to get a target on Whisper with a lack of initiative and Stay On Target.
That's Wedge Antilles, Darth Vader (soon to be viable again), Han Solo (who doesn't need it), Baron Soontir Fel (who might get more mileage out of Push the Limit), Tycho Celchu and Jake Farrel, if they also take Veteran's Instincts with the A-Wing Title.
- Autothrusters will allow the Interceptor pilots to join the Anti-Phantom fray with greater gusto, having previously been unviable due to the Turrets.
- Fettigator might also be viable as an Anti-Phantom.
If Whisper can be stressed between moving and finishing her attack, the window is pried open.
- Rebel Captive is the most reliable way of delivering this.
- Anyone who can attack in the window with a stressing attack can also deliver this for the rest of their squad.
- Any way of reliably dealing multiple stress tokens outside of the window is the only other way of achieving this.
If Whisper is Ionized she cannot Decloak.
- This typically requires Ionizing it through its Agility, which isn't likely.
- Alternatively, this could also be achieved through hitting a nearby ship with Ion Torpedoes while she's in Range 1 of it. Still unlikely, but these are the best shot of Ionizing her through her agility anyway.
If Whisper can be targeted by an Autoblaster, its high Agility is ignored, though its mobility still stands.
- Of the ships that can come close to dancing with her mobility, only Fettigator can equip this.
- Autoblaster Turrets are also interesting, but require that you maneuver so that she decloaks at Range 1 of you, and then shoots first. Not as survivable as we'd like, those HWKs and Ys.
If Whisper can be dealt damage without actually attacking it, its shell is fairly useless.
- Proton Bombs carry a high chance of 1-shotting the beast, but only if you can guarantee that it'll decloak into Range 1 of it.
Fortunately, Range 1 of a Proton Bomb can theoretically encompass 3 of the 4 possible locations of the ship. Block the other, and know which maneuver it's doing, and you get your shot.
Fettigator also has the possibility of moving after it decloaks, so you can drop the bomb with full knowledge.
- Proximity Mines close off options for decloaking, but also have the possibility of dropping the mine directly on it for direct damage. Very useful, as you'll know where it will be when planning your maneuver.
- Splash damage from Assault Missiles or Ruthlessness requires that it be in Range 1 of one of its fellow pilots, but are a way for anti-Swarm lists to compete.
So: From this analysis, I see the following potential counters that I want to try out:
Boba Fett + Proton Bombs + Navigator + Veterans Instinct, with consideration for Autoblaster and/or Andrasta Title for more bombs.
Jake Farrell + VI + Stay On Target, flying with a method of getting Focii.
Tycho Celchu + VI + Stay On Target
Wedge Antilles + Stay On Target, flying with a method of clearing stress.
Nera Dantels + Munitions Failsafe + Ion Torpedoes
Also, fleets with several Proximity Mines.