These weapons were built to fight something which almost inevitably was a lot more advanced in practice than Earth, and were brought along as a precaution against its return.
That's not necessarily true.
They might have been built to fight a race that was technologically closer to competitive with the Shiplords, and equipped with weak Practice- a race that was a threat, but not an overwhelming one.
They might have been built to fight a civil war among the Shiplords, against a Practice-using faction that was crushed before it had a chance to fully develop its potential talents.
They might have been built to fight a race that had something
similar to Practice but much less efficient or more costly in sacrifice, thus explaining why they aren't quite "tuned" to fight us.
They might have been designed as defensive anti-eldritch-horror defense zone generators that are being crudely repurposed as projector-type weapons to fight us.
...
The nature and power of humanity's Practice is inextricably tied up in the precise origins of that Practice, which we still only partially understand. It clearly involved the living-weapon dragons, a race of spacefaring bio-monsters created to defend humanity using the Evangelion-level bullshit of the Second Secret, knowingly sacrificing themselves. The circumstances under which that past enemy of the Shiplords, the one this weapon was designed to fight, obtained its power may be entirely different.
We cannot just assume that "Practice" is simply another tech tree that the Shiplords have an established counter to.
[] Withstand: This is not the moment that hope dies. None of you will allow it. The Shiplords have flung their most lethal weapons yet against you, and you yet live. Perhaps it cannot last forever, but you can endure this. The other Potentials among First and Second Fleet? You think not.
We're one part of a greater whole. An important part? Perhaps, but not the whole of humanity. Show the Shiplords that we have not abandoned more traditional means.
Notice that this action basically means "hunker down and let the Shiplords pound on you with the anti-Practice weapon while the rest of the fleet fights elsewhere," if I understand
@Snowfire correctly. Not sure that's a good idea, because it lets this one squadron of Shiplord battleships lock down the 223 while the rest of the fight goes, uh...
not great for the rest of our fleets. Under present conditions, we're effectively out of the fight, and given that we're among the heaviest heavy hitters that's not good.
Also,
@Snowfire , while I have your attention, does
Lantern's Charge leverage the conceptual web-of-humanity artifact Amanda's prepared for this battle? Or is it focused more heavily on Vega and her abilities? Or both? Could you expand on what's involved there a bit?