One will not look at Goliath ants and say they are weak. They have changed the meaning of the saying "as weak as an ant." These ants can bring down giants. So the giants are not having an easy time in their campaign against the ants.
'They must be so desperate. They even brought out their workers. They have survived for so long but they are pushed against the wall this time around.' He thought to himself.
The fact that the small worker ants have joined the fight indicates how serious the ant colony is taking this battle. The big soldiers are the ones that have always fought invaders of the colony and they have had success in it enough for them to survive the onslaught of giants.
There are very few races that survived the wanton killing of the giants of order, and even lesser than can survive in the ruined environment caused by the constant siphoning of mana by the giants. Goliath ants are one of the races that survived. They did more than survive, they thrived.