Regarding gold codex:
The Hawk is good but Hunter Killer is just around the corner researchwise, also at that point of the game, HV slot is useless so you buy one Hawk with the Flame Canon and that is it.
-Turtle is slow and unarmed transport, it loses its appeal quickly.
-Shadowbat is... forgetable, it suffer form the same problem as Hawk
-Flame canon is quite nice but you aren’t gonna manufacture more anytime soon and by the time you can, you have better things to put in your HV slots
-El Fuegp has the lowest transport capacity compared to the rest of the menace class vessels and since it has no repair bonus or shields it will spend a lot of time sitting in the hangar geting fixed. A bit too heavy price to pay for its speed I say!
-The golden codex has access to both Tome of Flames special wespons it seems. They however look unimpresive at a glance. The land equipment suffers form lack of focus, gray has MC focus, green has best survivability, red has raw killing power, gold has a bt of everything, but it feels like it is a master of none.