Its a cheat. You are playing Vicious.

Bombers mostly. Having a Kol or two for damage soaks and some Dunovs (shield repairs) and Hoshikos (hull repair) in support is nice as well. Marzas have more forward firepower then Kols so they help as well. And keep the frigate counts low (send them around attack the enemies rear areas) as they only feed the titans XP and make them stronger.

The ideal composition would be a Level 8+ Ragnarov Titan with maxed out Snipe and Overcharge, backed by hundreds of carriers with pure bombers.  You need those hundreds of bomber-carriers to win - if you don't have them, build starbases with maxed hull and Safety Override (to kill the support fleet once they're nearing death) to slow it down until you get them.  Once you fight it, remember that it gets increasing cooldown reduction as its hull enters the red, then it gets 4 minutes of invulnerability before it dies, so you'll want to retreat all non-carrier units a bit before it falls below 25% hull.

In the meantime, figure out where his Titan foundry is, and make sure to kill it before it can rebuild another.  If you can micro Timed Explosives on a large pack of your scouts, that might be the best solution.

I will try that, I love to fill my ships with bombers, however the advent can fill even more fighters/bombers than me. Which I find is a big problem as it forces me to get anti strike craft ships.

Kill all progens first then go for other caps finaly ff eradica. Don't stay still let him chase you around your defences. If eradica is low level few dunovs with anti am ability will be enough are great against advent vicious ai. 

Don't destroy your sb + defences. Instead of red button get yourself docking boons for faster am regeneration and repair.  Vicious ais has a lot of cheats one of those is faster build times. So whatever you kill he will rebuild very fast unless you can take out his factory planets.

Advent heavily depends on am reserves and denying that is your priority. Use mostly capital ships and carrier fleet with cielo that have 2nd ability unlocked.

I really have nothing good to add. I just think its a waste of time to even speak these dayz since im going through this phase of depression. [sigh] listen to everyone here about the eradica because they can offer more than i can but for now just lower the difficulty down a notch or two. 

Thanks for the advice guys, I was able to kill that monster titan 4 times to win the game. However, solely because I tried my hardest to keep my titan level above that advent titan. Although, I am sure the AI cheated again because he was level 9 by the end of the game.

Following suggestion made by everyone here, I was able to contain the titan and the supporting fleet till the AI titan reach level 6. After that it becomes a damn hard job. The advent titan have ability to deal mass damage to my capital ship. I have 8 supporting my titan, after some funny sound from the advent titan, all my capital ships were left with half hp. Not to mention that it also takes out 20-30 of my repair bots and garde frigate and light carriers as well! So the area damage dealt by it is extremely high. And after level 6 and above, the last 3k hp is nightmare and it will turn blue after killing it, where I must hide for a few minutes before coming back.

I just need to  try figure out how to counter that titan if my titans level is lower and how to keep my losses down when I fight against the titan.

Thanks again everyone, many nice advice here.

Dunovs with am drain if tec. Turrets with passive regeneration if vasari and radiance with am bomb if advent. Higher the level of titan more of those type capital ships you need. Unless you are vasari

He is playing ai.....

Stop linking to your post in every goddamn thread please, thank you.

100 corvettes ......

If its level 6. Now than unyielding will can trigger while it gets damaged you certainly do need a lot more antimatter drainage power. The ability cooldown increase will still help a lot though. Still, I have to agree with Greg that the corvette approach is best for the Eradica. Antimatter drainage is probably superior on the Ragnarov, and one the Vasari since I guess they missed the memo that Corvettes counter titans.

Theres no end to Goa's stories because even when you kill the eradica at its low levels he then still has to somehow bring up unyielding will which is way up the experience tree.

If your facing a level 6 eradica then rage quit