Sensing victory, the party takes the initiative.
Gaerys lashes out with Giantbane, badly wounding the hornfoot attacking him. The hornfoot's response* is weak - Gaerys easily blocks it aside, and then ends the cruel savage's life with another stroke of his blade.
Antheris causes his creeping mass of fire ants to move forward and engulf the hornfoot leader! The druid then begins to cast a spell to boost his comrades' combat effectiveness**.
Ethan battles toe-to-toe with Nosra as a second hill giant attacks the knight. The knight's swing is easily parried away by Nosra with a flick of his spear...and in one smooth motion, the obese but shockingly quick giant plunges his spear deep into Ethan's abdomen. Ethan cannot hold back as a scream as his entire body sears with pain. Ethan is distracted by the wound and simply cannot avoid another strike from the hill giant's axe. He tries feebly to strike again at Nosra but the Chief gleefully swats away the blow and smiles as he prepares to end yet another character's life.
Out of the corner of his eye, Ethan sees Marcus scale the east gate...hopefully help is on its way...
ETHAN TAKES 30 DAMAGE!!!
Natural 20 from Nosra and natural 1 from Ethan...not what you need here...you can attack next round...your situation is dire enough

Hollis bravely bounds forward to attack the ogre coming from the north. The cleric hefts his heavy mace and slams it into the chest of his opponent. It howls with pain and tries to strike back with a swing from its maul. The cleric masterfully parries away the heavy blow.
Vorsyin unsheathes a dagger and looks in the glassy eye of the held ogre as he coldly slits the throat of the brute. Its life dribbles away in front of the mage.
I am out of time and unable to post an update tomorrow. I assumed that you did this given your question. You may change if you like.
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*I recently read that a character's second attack always come at the end of a round.
** PfF does not help anyone here, so I let it go. Sorry if I misinterpreted intents with that spell.
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Shield - X rounds
Summon Insects - 4 rounds
XXX
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Antheris: 30/48
Vorsyin: 48/48
Gaerys: 23/60
Hollis: 27/50
Ethan: 4/71 !!!!
Marcus: 35/35
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Map: