I use standartly 4-5 pieces of shields.
Look this:Fleet Name: Phalanx
Space/Ship: 154.000
Attack:  3.129.687
Attack accuracy: 10% 
Defence: 4.240 
Hitpoints: 7.272.000 
Absorb Power:  49%
           Weight    Buy Price     Hitpoints  1x Armor   100.000    516.500     6.700.000 
           Weight    Buy Price     Energy Gen 1x Power   50.000     13.200        20.000.000 
        Weight   Buy Price     ABS         Energy4x Shield   500       87.500     +28%     2.000.000 
             Weight    Buy Price    Energy1x  Special   1.000       85.000        2.000.000   
DEF Bonus: +6% 
Defence: +4.000 
Hitpoints: +500.000 
              Weight     Buy Price       Energy1x Weapon    1.000       26.500       10.000.000   
Attack: 3.130.000  
ACU: 10% 
I have 3 fleets of these ships. Each fleet have 3 of these Ships. It doing for fleet power 1.003.020
On SO server i have big problems to complete missions on Encryption 1 and terryble on 2. Any higher Encryption mean totaly destoy my fleets and unable play. Because lose ships unable rebuild them and oters players finaly destory me - that mean game is unplayable. Because playability is only luck. Not how good player is it. I made more than hundrets test of this. 
I can able lose this ship on Missions Encryption 1. But i do not undernat how when i read max fleet power is example 133.000?  How is posible that i discover when ataccking on mission encription 2. And read fleet power 1.145.000 but in real i discover two enemy fleets with power 3.240. I destroy all these ships but i do not receive any rewards and mission say so it is unsucefull? WTF???   

I test many fleet designs, more than hundred. Yes i test that i see and if understand that have been on somewhere on these forum discusions.
Satan that is werry funny. How do you do fight fire with fire that you do not have because somoe other player destroy it? And atacker is more than 1000% stronger than you?  Please show me way? I been in one stupid aliance that still say somethig on they forum but anybody help me. 
It is better be without ally. At least this time i knew so i am alone and not have any restrictions. 

Cameron07 - yes you´re right anyone can attack other peoples, and now i try show you you words. I hope so you fleet power is much stronger than you. I will happy destroy you ship and take as much as i can able and repeat it and repeat it. You will soon hate this game as i. Because you not able play this game and you not receive any fun.  
 
Frank and others. I do not understand why you do not understand me? And why other peoples in another games and forums understand me corectly???  

I been happy so all there that do not have problems with complete misions and destroy other players will write me there their ship designs that now not used. Or programers will make manual or basic finished ship designs for starts or other players. That sips not must bee perfect, but for able complete missions Encription 1 - 4 or 5 on SO server?
I make for you easy table that you can paste copy and write you ship designs.
And remember that so ships not must cost more than 750.000.000 credits.  That player that have money it is easy play and design nice ships. But first you much reach here where you have a loot of money.