What are the best ship(s) and/or squads that benefit greatly from using the expose ept?

Chiraneau with Experimental Interface. That's it.

Since it takes an action, offensively it's not really better than getting a focus unless you can do a second action. Experimental Interface + Expose is 7 points to get one extra die, mess up your agility, and leave you stressed. It's not really worth it. You can try it on a decimator if you want, but that is about it.

scum kath could take it but its lots of points and would make her a huge target and she doesnt have the durability to last long like a decimator does. 5 dice from the raer arc or 6 dice at close range is pretty scary tho