My last few games I have noticed somthing, my fleets of small ships tend to hold up much better than my fleets of larger ships, heres why:
My smaller ships are constantly upgraded with the latest offense/defense capabilities since they are cheaper to maintain.
My ships are much faster than the AIs so I dictate when and were I fight, thus gaining the attackers bonus. Since I get to fire first I can wipe out half the enemys fllet before they get of a shot!
Additionally since a ship can only fire at one target per turn, I dont have to worry about overkill, ei. if a ship has only 2 HP left my ship with 15 attack is wated on only 2 HP. A smaller ship only has 8 attack. Since the smaller ships can group into larger fleets, I can more accuratly ditribute my attacks!
And finally I can build a heck of a lot more smaller ships a heck of alot fater than larger ships!
Now ofcourse Im totally hosed if the AI fleet gets the jump on me... but thats what strategery is for right?... Or have I just been getting lucky?