Okay, the only conceivable way that they can project a wave of glow into our antimagic zone is if they are not projecting magic. Well, okay, they could be overpowering us, but there would be at least a little bit of interruption or something, there would have been SOME sort of noticeable effect. Okay, one other option, their antimagic magic is somehow completely immune to external manipulations, even from a non-magical gem-sponge with some semi-magic suction effects... Ugh, the two didn't interact at ALL. It can't be a fake, an illusion would have been sucked up. Unless it was actually a pre-formed manifestation...
Okay, only two ideas seem plausible. They make a cloud of metaphysical no-fun over the battlefield, which takes out everyone's mages so I guess their troops must be vastly superior to ours.
HEY!!! HOW IS THEIR SIEGE GEAR CATCHING OUR TROOPS?!? We can just retreat into the forest just like their ships have been doing for the past forever!
Very stern-eyed order! : withdraw into the deep jungle
We concentrate on dense forests and just withdraw into them. Our cavalry will be off fighting someone else's war so we won't be slowed by horses trying to navigate jungle and we won't be bothering with siege gear so they can leave their almighty ballista that somehow fit on their light ships or the new giant ships we haven't seen in open water somehow. Then we just exploit a new revision to just make the surrounding trees run rampant to give us super-duper stalling-tactics while we focus designs on the sea...
Ahem... Got a little lost there...
Their almost certainly either have a pre-generated cloud of metaphysical no-fun or a, umm, I thought I had something...
If it were active then our charms would drain it. If it were natural then they couldn't control it, as a natural force of no-wizards cannot be controlled by wizards, and these are definitely wizards because they are still casting positive magic, I think, did anyone notice any Moskurger wind? so it is neither an inherent quality of magic, such as our vacuum, nor anything aggressive as that either WOULDN'T interfere with our wizards or WOULD interfere with our charms.
So the problem is that it is pre-generated. So all we need to do is make our own charms more aggressive, make them suck up pre-generated effects somehow, it probably just means turning up the juice to overcome some natural inhibition of magic to move. Then we can suck up all the antimagic and convert the whole cloud into sound as soon as it hits one of our charms...
I would also like to see alternate ammunition in a single design like they did, we could have a carriage filled with fist-sized shot and one with antimagic bombs and one with kegger heads and one with spears... And would also like to second that long0range fireballs could be a revision.