Minimum Stats:
70 Ranged required (80+ Recommended)
70 Defence (80+ Recommended)
40 Prayer required (70+ Recommended)

Required Equipment:
Mithril Grapple w/ compatible crossbow

Highly Recommended Equipment (Ranged Attack Style is a must):
At least one piece of Armadyl armor to prevent being attacked in the chamber
High Ranged Defence/Offensive Armor (Pernix, Armadyl, Karil's)
Chaotic/Rune Crossbow w/ Diamond (e)/Broad Bolts

Recommended Inventory:
Emergency Teleport
Ranging Potion(s)
Saradomin Brews and Super Restores in a 2brew:1restore ratio (else prayer potions and rocktails)

Strategy:
Enter the God Wars Dungeon, head SW, use grapple to enter the Armadyl chamber.
A kill count of 40 is required to enter the boss room. Please obtain this BEFORE the scheduled event time.
Once in the boss chamber, stand next to a wall to avoid being stunned from Kree'arra's attack. ALWAYS have protect from ranged on while he is alive, as he can hit over 700 with this style.