Hi guys,this is not a solution for the Platinum itself but a tip to make it easier.technically you can avoid the hard time trials but you need to do the normal ones twice. First finish all the normal trials and DON'T DON'T pick the items in the pool. Once you killed the last boss quit to main menu and choose new game plus on hard,once you're in the shrine go to the pool then BOOM you will find the normal items have become the hard items. Pick them up and quit again and this time start a new game plus on Normal and do the trials again and you are set. Credit to the original guy who discovered it on playstation trophies. Peace