I hope this is just revision-worthy, but we NEED to make Storm Strike an all-weather spell. If we can start calling down lightning strikes from over the horizon or even from the deck of a warship, we'll be capable of turning the tide.
So, I'd propose this:
Enduring Death
By streamlining the enchantments used to fly even further, and applying them to the hull of the ship itself, the Alsamma Safina can be made to fly higher, faster, and longer. It can also afford to carry enough extra mages to cast Storm Strike and the Hammer. The carpets will be kept to provide extra lift whenever possible, but they should be no means be a limiting factor in production. In order to increase carrying capacity, the ballistae will be left behind. We do not need them if we can dodge artillery and cast Storm Strike.
The newly-refined enchantments will also be applied to our carpets.
If we combine THIS with an all-weather revision for Storm Strike, we should be capable of literally raining death on Arstotzkans everywhere. Storm Strike should, by now, be an easy fix. We've been working with weather for DECADES. So, combining these two should give us the all-important killing capability that Arstotzka's artillery has....except it's better, because it's magical and has "Allah" (In Character designing YEAH!) written, quite literally, all over it.