A steel phalanx fireteams need a Makhe or Hoplite to be formed. Scycla has Makhe keyword for instance. Can scyla form the link or do i need a makhe still ? If i need to take a makhe still, what is the purpose of keywords in paranthesis
Keyword in brackets means that the trooper can count for composition bonuses, so a Makhe with Scylla and Charybdis FTO will get the +3 Discover bonus for a "Pure" Fireteam. Brackets have no effect on Minimums, so you still need an actual Makhe or Hoplite to create the Fireteam.