U mean for FAC yes? (my Gunboat r some different in concept and build a normal engines,not "GB" fastest and monster-fuel consume:DD)
There r very many good Naval Designers than me..but my FAC and Gunboat r mainly for System Defence Squadroon pourpouse,so am not build..a "dedicated" tender for this class,ive 3 mainly Squadroon (with tender):
Cruiser,Carrier,Escort.
One day or another i try to build an "tender" who can take inside (on hangar) the entirely FAC-1000 tons class,probably become very big Class ship for those objective.
But an idea ive: Passive and Active sensors array very powerful must mount up an AEW dedicated FAC,so u can support closely ur FAC squadroon,tender MUST remain on backward,with some Close Escort,not FAC class.
in a "FAC Squadroon" my idea was putt: tender,FAC-AEWClass,5 CLE (tender's Escort dedicated) 2 tankers,10 FAC-Class boat,1 SupportVessel,1 Squadroon Collier (if ur FAC use missiles)
"Systems" are all inside various ships in this Squadroon.