So hear it is:

RAC + expose + experimental interface + Isard + gunner

Youngster + calculation

2X Obsidian Squadron

I know people have said Predator is better than expose, and I can understand why if it weren't for Experimental Interface. With the two combined you will get 5 shots at ranges 2 and 3, and 6 at range one.

Anyway your CnC is appreciated.

After re-examining the Youngster pilot card I realized that the combination doesn't work.

So I have swapped out Youngster for Dark Curse.

If you want to play a nasty RAC then run Predator, Vader, Gunner and Engine Upgrade.

This allows you to put crits through on tough defense targets like Fel or Whisper twice per turn. Of course you use Vader very conservatively. But you'll see more benefit out of that build than you will with Expose.

I would run Fel or Whisper alongside this RAC for better end game strength though. You know the Deci is going to die in most of your games, so you need something that will clean up what's left of your opponent.

Decimator only has 3 attack so Expose gets you 4 at range 2-3,and 5 at range one. Predator is seen as better as the maths apparently shows that 4 Dice at range one, that can be modified (via focus/target lock) are more likely to do more damage than 5 Dice at range one that can't be modified.

Unless you use your action to focus then expose isn't as effective as you might hope. Exposing off Ysanne makes you lose the ability to modify dice, plus playing as Chirenaeu 1 evade a round is a bit pointless, you want all out offense! I'd drop Ysanne if you want to keep Expose.

This comes from my experience recently getting top for at a store championship with an Experimental interface, expose, Ysanne, Darth vader Chirenaeu Decimator. Vader can be a fantastic replacement for Ysanne (used sparingly), he is a great counter to a lot of aces.