
Your grab does hp scaling damage, id say a big boost in damage is worth loosing the pull. You hurt so badly when full tank its honestly absurd(for what you have, its not gonna one shot people or anything). You can swap the second teir one for more hp pots if you think thats better(it probably is but whatever)
Honestly you really just want the staff for double grabs, I go thebes and selflessness for the hp+protection and hastened for more cc to work with stone of binding, draconic has duel prots and healtg, but the last 2 items are optional. I figure if you grab an adc you could go leviathans and neamion lion, but just build as you see fit