So, just to leave my opinion here
Although I love the Titans' Designs they don't get to the same level as vampires by a long shot.
You do get a 0-damage first attack on you, but that's it, once that's done, they are at the same level of a Cat 9 or 10 normal dragon.
Vampires in the other hand, all of them are Cat 10, you have special abilities, some of them being extremely strong, able to kill an enemy dragon of the same level and category in 1-hit, something that is impossible for a Titan,whether is cat 9 or 10, you can recover huge amounts of HP to keep fighting, and both abilities can be re-used in an environment like arena for example.
And about elements, basically all vampires have at least one premium element like legend, pure, primal or ancient on them, even if is not the defensive one, again, in the arena, that's quite an advantage. And to be fair for titans, even tho only a few of them have premium elements, most of them have opposite elements which is quite handy in arenas 1 and 3. For example, the Nature Titan in water, nature and light arenas can do critical on other dragon from those arenas, since is very common to see a lot of dragons with the defensive element as same as the arena, and almost all titans have this trend, at least 1 opposite element on them.
But still, I think vampires have a lot more advantages overall.
Corrupted I'm not fully sure if they are really better than normal vampires, they are mostly cat 9, and as I said, some special abilities really carry a dragon to extremes.
Still didn't see any karma in action to have a solid opinion, and I'm really excited to check on the new ability for the 2nd wave of divines