Why would you put thornmail into core items? Riot recently nerfed healing and anti heal items. Why is it core instead of situational. What about building items that benefit from the massive amount of hp you gain by having ranged melee grasp procs +health from frostfire/demonic. Such items would be abbysal mask which gives 25 magic pen (great with frostfire) and randuins/maybe frozen heart which give reduced auto attack damage.