pathfinder 2e – How to surpass Construct’s Hardness with no heavy-hitter at low level?

In Pathfinder 2E there are enemies like the Animated Armor, constructs with the defensive ability “Construct Armor” which reduces all incoming damage by an amount equal to the listed Hardness value. Is a party with no heavy-hitter (fighters, barbarians) just supposed to hope for a critical hit or maybe chip damage the creature until it breaks? Or are there other ways to damage the creature?