Once in a game against a Vasari AI, I was Advent Rebel, with a level 10 Eradica, I could destroy his full fleet, even his weaker Vorastra without taking any serious damage, I don't know what the hell he was doing, he could only damage 2000 shield and maybe 1000 hull, ridiculous maybe that genius was moving his fleet mindlessly in the grav well trying to reposition somewhere? Or is the Eradica that powerful? Now I feel sorry for not paying more attention, I just left the Eradica play itself as I saw there were no real threat to it, I managed my fleet on the other side of the map instead. I looked in the stats I removed almost 2000 fleet supply with only my titan in two battles that titan is the best
Another game (me and 3 AI) I was VL, my ally was VR, against Unfair Advent (doesn't matter which faction, as she had no titan just a big fleet) and a Vasari Rebel, I had a strong starbase, but small fleet because of the queued Vorastra, I was attacked by the Advent fleet and the Kultorask (I had no idea why it was there..), I thought I will get killed sooner than later, BUT they took immense losses, the titan was destroyed without causing any trouble (lev4 I guess), I was really surprised. I could easily defeat a five times bigger fleet with a titan, that game was the game that showed me how great the Orkulus is.
I just wanted to say there are circumstances where titans are invincible if handled well, and there are situations when they stand no chance against the enemy. AND I don't agree with the statement they are way too powerful, if you can get rid of their antimatter or keep their abilities disabled, they are not that difficult.
Ankylon is a waste of resources (but it's a must to build it if the enemy has a titan), weak support thing... I was defeated in a key battle against two AIs having the same amount of fleet at a neutral grav well (yeah I know it's not the best place for that titan, but my ally, an AI, was killing himself I must have helped him..), there were 1-1 titans on each side, I had an Ankylon, and one enemy had a Coronata, I just watched how my fleet and capitals went down without even causing much damage to the enemy...
And one more thing, focused frigate fire may not be the best idea against a titan, it can take brutal amounts of damage before going down, and in the long process it can use many Chastic Bursts. You MUST disable the abilities of it, with focused fire it gets max shield mitigation in one second, and if it sacrifices a stronger frigate or cruiser to repair itself you will never be able to get even it's shields down again.