Hardly relevant....on some maps, the only way to get to an AR world is to put your fleet within "wail range"...and in some cases, triads or quads of planets can't be attacked (or even approached) because of overlapping "wail ranges"...at some point, your ships are going to have to actually attack, and right now the only true counter to wail is superweapons...shield bestowal and an SB can make sniping culture centers extremely difficult late game, your "50 corvette rush" strategy really only works if no defending fleet is close by and the other player completely neglected defenses...
Seleucia, the perfect defense requires a lot of resources.
Yes, if you have been unable to thwart your opponent so they have full tactical slot defenses, a large fleet, wail, lots of economy, starbases at every world, and a titan, you are pretty much screwed vs. the advent rebels. This means that your strategy failed. There is still hope however, as they have to actually beat you. So you can use your bag of cheap tricks to really try to blow the crap out of the advent fleet. If I remember correctly titans are quite resilient and can take out defenses pretty well, and can even withstand super strong weapons like wail. So once you kill the advent rebel fleet using your bag of tricks, you can kill the advent rebel defenses with your titan of choice.
Luckily, most games (like 80-90%), wail won't even come up. There are a lot of random situations that have to occur.
Sometimes wail is extremely strong positionally(not so common). Other times wail is impractical because you are under far to much pressure to even go that route (quite common).
Now when it starts to become the mid game, things start to change. Some noobs might be dead, someone might have made a big mistake.
The thing is, every faction has their super ability. Without wail of the sacrificed, the advent rebels are really a gimp faction.
Anyways, this thread is about why the vasari rebels are still banned. Wail of the sacrificed is a good topic for another thread.