What's the role of wpa on core attackers? I'm still learning utopia so I might be very wrong here, but my understanding is that wpa is mostly linked to economic warfare since fireballs=dead peasants so in the core it's only useful when it's higher than enemy core on average, so you can use your own attackers mana to deny your enemy attackers economy from the start.
But is it really worth it? Most attackers enter wars with very high draft and almost no peasants, so while the impact of fireballs is minimal on them (but it might force them to lower wages eaerlier).
The other use of wpa is to protect eventual acre gains on said attackers and allow peasants to populate them and thus generate gc, but for this you'll require a very high wpa for attackers and even then it will be easy to shut them down anyway.
Meanwhile higher wpa means lesser opa and dpa, while making it easier for them to chain you.
So I'm asking more expert players than me what's their take about wpa on attackers. Is it worth it to go over 2 at any point of the age? Why?