why?
Because Latts Razzi does the most work against the largest variety of opponents.
Gonk is crazy inefficient and so despite early excitement, it never saw wide usage in the competitive field. It found a temporary home on Manaroo despite its inefficiency due to the unique nature of Manaroo in the Dengaroo list (offensive actions had little or no value and Manaroo tries to avoid combat for an abnormally long stretch of the early game).
Recon Specialist is a solid way to boost action efficiency and I'm a big fan of it on lots of ships with at least 2 agility dice (though there are often superior options) but the problem on Dengaroo is that Dengar doesn't really need the extra focus tokens, except against Wes, Palob and Carnor, and against those guys he can use Glitterstim to pummel them pretty hard in the opening salvo. The second focus is nice on Manaroo when she has to play defensively, but it means that you're playing defensively at the cost of leaving Dengar without the re-usable focus token that he's hopelessly addicted to. He really need for it to be passed, but if you pass it, Manaroo's defenses go down.
Latts Razi has none of these flaws. You can pass Dengar his focus token and still gain the defense bonus of Latts. Likewise, you can get your defensive bonus without having to spend a pile of actions, so if you have to make a secondary movement action (like boost), then a focus (to give to Dengar) Latts still works, and you didn't have to save 1 of those 2 actions for Gonk.
Latts is so far ahead of the other two for this particular ship, for this particular role, I'm surprised that it's not the standard default in everyone's mind, especially since about 50% of the ships capable of catching Manaroo in the first place are PtL users. Heck, consider how effective it is in the mirror match.
Just my two cents.