Bad tactic when there are between 100 and 200 of them, and most of the people who can use them can swim...
The weapons are good quality human-made steel - much better than a wooden stabby pole. The group knows that there will be a concerted attack on Floodford using these weapons. Without the weapons? Hard to say.
Between 100 and 200?! I guess our initial estimate of about 50 was off by a little.
Piratecat has indicated that there's no way we can destroy the weapons in time (even with Scorching burst and barrels of napalm), but that we could unload the barges hastily into the tower. Either way, denying weapons to the approaching horde seems like a high priority!
Once we're in there, we'll have two options:
1. Leave the door open, letting Strontium fire Scorching Bursts out (and allowing Doc to do the same with arrows), and have the rogues and paladin deal with anyone who tries to squeeze in with us. Ideally we'd kill enough of them to break the morale of the survivors, and they'd flee.
2. Lock the door, hunker down, and hope that without weapons, they'll go home instead of march on the town. Alternatively, the mob could try to lay siege to the tower, and we'd have to hope that the Grey Guard will send someone out to find us before we run out of water.
Then there's the "war golem" at the bottom of the tower. We know that the approaching horde is likely led by someone who can control it, so it's especially important that
he not get into the tower with us. (And we'd best hope he can't activate it from
outside the tower!)