i dont believe pking is anygood without having that smiley face(vengence)
turmoil is amazing but every time i go pking with it and am about to ags spec, they use that bliming smiley face above their head and i always get knocked out,
But for PvM (playerVsMonsters) ITs amazing , wouldnt say its that good at Gwd but its definatly better then normal prayer
but for corpal beast its highly recomended to have ancient prayers and besides the quest is easy aswell.