I'm know how to use the relic, I've always been the relic holder and I went through many runs with sword, I've beaten Crota on hard 31x 29 as a swordbearer, combo wise... When Crota is going to his knees you can do damage. So as he's going down not when he's down you can smash him 4x, same thing with second down, in total of 8 slams. Brings his health half way. You would know if you made a hit immune if it's a tad higher than half way. Now if you want Crota to almost 1/3 health and one sword you gotta fast, once rockets are gone, you do the combo of "light attack, light attack, heavy" now the heavy won't be a slam it'll become an uppercut which will do the same amount as a slam. So you "light, light, heavy, light, light, heavy, heavy" in one down, seems impossible but it takes practice, so I'm two downs doing the combo without a super will bring his health almost 1/3. I will link video proof of who taught me named "Giggle Monster" he is a Hunter and you can watch the combos in action, sadly I haven't recorded it yet cause I can't record XD but that will change in a week or so. You can take Crota on hard down in two swords, with no ogre and no super :) https://m.youtube.com/watch?v=sjiAtMCOrps Hope this helped, I'm a swordbearer and I've been since Crota came out, 32 Hunter PSN BronzeHD add me :) for help