|Vulcans liked their ships so much, they put a ring on every one.|
Vulcan cruisers were amongst the most powerful of starships in Enterprise, it took four Tholian ships to smash a D'Kyr in Future Tense, but it survived the attack and presumably was repair and returned to service later on. You rarely saw these ships together, which leads me to think that maybe Vulcan's fleet was small, although they did assemble like the Avengers to attack the Andorian homeworld in one episode. They only sent four of their D'Kyr cruisers to attack that planet, along with some support craft, not much when you're trying to knock out an enemy power.
|Pew, pew, pew.|