Hey guy, I know it seems ridiculous, and yes I used to push the Templar on hard just to get through it faster, but I do know how to kill him on hard fairly easily. And I have gone back to this now and I will share it with you. Make sure you explain it to your group and you may have to do it a few times to get used to where to go when he teleports. Before the relic holder picks up the relic, have the other five people go to where the right conflux spawns, you will be here the entire time. Pick up the relic and join your team. The relic holder will help with supplicants and oracles. You will only kill the oracles on that side, don't try the others you'll just have to cleanse for those. When you are supercharged make sure your team is ready and tell them to stay close to you. Hit the Templar to remove shield, as soon as you do, and the shield is down, ground smash to remove bubbles. Every one unloads on Templar and you take care of as many harpies as possible without putting yourself in danger. You can do this even after losing three people an still kill him.