I realized that in higher levels, before you could get your new, stronger ship, beating a D'deridex becomes incredibly hard. These ships on Commander (for example) rank 7-10, even if they're lower in rank comparing to you by 2-3 are very strong.
They use always the same combo: First, they disable your ship with Viral Cortex, so they can get close to you, even if you don't want it. Then they grab you with their tractor beam so you won't go anywhere, and then they either hit you with a torpedo spread or if you're lucky only with a heavy plasma. Of course they fire at you all the time, so in the end you end up with no shields in at leas one side of your ship and with at least 20-30% of hull integrity loss. Adding to this that their phasers are extremely strong, they almost unbeatable...
What tactics do you suggest to get rid of these beautiful but deadly warships?
Approach it from behind, cause its Viral Matrix can only be shot in an frontarc and this huge bird need its time to turn around. scienceteam will cancel the effect of the VM btw.
Also stay away more than 5km to prevent beeing tractored, but remember that the tractor is a frontweapon with a rather narrow arc. so staying behind the ship will do in most cases.
ive never had any problems with dederidex vessels, i just decloak 2 km off their 6 o clock with attack pattern alpha omega beam overload 3 high yield torpedo 3 and whammo, dederidex go boom! viral is a frontal arc power he cant viral you if you arent in front of him, with feds not having cloaks it might be trickier but you do have the ability to set aux power high and sneak around to his backside with MES (thats mask energy sig for the uneducated, its a ghetto cloak thats good to around 5 km vs npcs with your aux up high) and then open up on him from behind, lock a tractor on so he cant turn to viral you and im sure youll do fine.
Funny, but the holographic Galors are not so big problems for me. Place a few phaser beams on your ship, they will pass their shields quickly and their HP is very low comparing tot he other vessels, so they're doomed after a few shots.