[Phoenix-D]

1% accuracy can be had, I think.

Watch:
ECMIII: 60%
Stealth+Scattering: 30%
Legendary Ship: 40%
Legendary Fleet: 40%
Total: 170% (it can get worse, too- I think ship XP goes up t 50)

In comparision, the best attack:
Combat Sensors III: 65%
Legnedary Ship: 40%
Legendary Fleet: 40%
Total: 145%

Now, that's a 25% disadvantage just to start, and assumes the fleets and ships are equal in XP. Add in unequal fleets and the range modifier (10% per square) and things get ugly, fast.

Phoenix-D