Behind the veil of beauty and simplicity that shrouds Antonica, remnants of the War of Plagues can still be found corrupting the landscape. What was known as the Antonican Basin to older generations is known amongst younger generations as The Firemyst Gully, a cess-pit of death and decay.
If you simply rush Galintari, dozens of zombies will pop out of the graves and will wipe you. You can use the shovel you bought to dig up the graves so you can fight the zombies a few at a time. They won't despawn if they kill you though, so if you run into trouble it may be faster to die, resurrect and clean them out afterwards. There's even a mender in the zone.
Alternatively, if you destroy all the wards (impaled skeletons) throughout the instance, the large zombie pack will not spawn and you can engage Galintari safely.