Kree'arra is within God Wars Dungeon, and it is recommended to at least have Trollheim Teleport (Lunar) unlocked. You can also use God wars teleport or a Max Guild boss portal tuned to Kree'arra. From Trollheim, climb down the cliffsides go north past the thrower trolls, past the large rock, and down the entrance into the dungeon near the wolves. Once there, run south and cross the chasm into Armadyl's Eyrie - this requires 70 Ranged, which is not boostable.