I just want to confirm something, under N4´s Enomotarchos, we can mix Dactyls, Thorakitai and Myrmidons on the same fireteam? There is no mention to different enomotarchos units anymore, the characters also do not form teams with X or Y, they just "count as". RAW (https://infinitythewiki.com/Fireteam:_Enomotarchos) is: FIRETEAM: ENOMOTARCHOS Troopers possessing this Special Skill can compose a Fireteam of up four members if they belong to a Sectorial Army List. AUTOMATIC SKILL Optional REQUIREMENTS ► The Trooper possessing this Special Skill must belong to a Sectorial Army List. ► When forming the Fireteam, the owner of this Special Skill must be part of that Fireteam: Enomotarchos. EFFECTS ► This Special Skill allows a Fireteam: Enomotarchos to be formed, following the rules of Fireteam composition. ► It is not compulsory that the owner of this Special Skill be the Team Leader of the Fireteam: Enomotarchos. It is also not clarified in the charts... It seems too good to be true, but without a FAQ I believe it would be legal.
https://infinitythewiki.com/Fireteams:_Basic_Rules A Fireteam must be composed of Troopers belonging to the same Unit, or of those that the Sectorial Army List specifies are able to do so. Some special Fireteams can ignore this Requirement, as specified in their description or in the Sectorial Army List. Nothing in Enormoustacos allows you to ignore the common Fireteam restriction of being from the same unit, so no mix and match.
I get what you are saying, but Enomotarchos is a Special Fireteam, and it says on the basic rule: "...or of those that the Sectorial Army List specifies are able to do so. Some special Fireteams can ignore this Requirement, as specified in their description or in the Sectorial Army List."
It is not a special Fireteam, it is a normal type of Fireteam like Core, Haris, or Duo. Special Fireteams are listed in the Sectorials chart very clearly such as "Special Fireteam: Duo, Achilles v2 + Patroclus FTO."