Best ways to kill it

1- covardly use a bug repelant and attack covardly the arthopreula, you can prepare before to attack

2- use a asault Rifle Or shotgun or shotgun 2.0 or good ranged gun (I use a ascedant Longneck rifle)

3- granadas or explosives

4- melee guns (not recomended)

Use too a shield to protect from the acid spit