really depends, Marvel and DC have some strong characters who can snap their fingers and destroy Galaxies. However, the Antediluvian pose a Global thread in their setting, and can directly impact the spirit realms.
I'd say they'd enter the Top Tiers of Marvel Earth. They're no push overs in that regard. The level 10 Plot Device allows to do what you need with a discipline. Celerity offers bullet timing (and then some), some of their magical abilities are Hax in the sense that they vary in scope.
Examples:
Chimerstry 10- Trap another individual in an alternate reality. All the laws of that reality are created by the caster himself. Any attempt to locate said character fails unless the caster's allows him.her to escape.
Chimertsry 9: Called Mayaparistya can render objects insubstantial, and negate things from existence. Could Ravnos has deleted the Sun? Yeah sure maybe...i mean with this power depending on the number of successes you roll, you could:
make the environment behave illogical (gravity twist sideways, rivers stand still as hills flow upwards)
Render objects harmless, (Guns don't fire, knives/Swords won't cut)
Turn Candles into Tarantulas
Delete offending material from existence.
All this info can be found on pg. 67 of Clanbook Ravnos.
This is just 1 specialty Discipline , Obtenbration at level 10 can blot out the sun, Vicissitude can allow your body to recreate your body after dying, and with Dominate at 10 you can enslave anyone, or large groups of people. It's really up to you, while there are examples of level 10 powers you can really just make them fit your story line and just have them do what you need them to do.
Caine...is just overkill...just no lol LIke I said he'd be some kind of God or Avatar, I mean, look God cursed this man, and has basically left him to repent for his sin. In the game, Caine choses to defy God and sires Vampires.
This doesn't mean they can't be killed, it's just REALLY hard to do it. If for some reason these vampires united and decided to work together. Game over...why do this in your game? lol Any how, yeah They'd do rather well with Marvel Earth.
NOTE: These vampires are featless, except for Ravnos, and Caine's mythos/History they are left ambiguous. Whiet wolf felt that giving them stats would lead to someone created a character that could kill them. Ravnos did what he did weakened and in frenzy (meaning he wasn't in control of his actions, he was completely bloodlusted, but lacking common sense to control himself. Still look what it took to bring him down.)