Believe I'm the first on YouTube to finish this.
The trick to this build is pairing the Soulless Assault glyph with Flame Whiplash buffs during realm shifts. During realm shifts you can easily stack successful attacks with a charged whiplash which allows you to consistently restore your relic.
I forgot to share proof until after the cutscene ended, proof is in a second video:
• God of War Ragnarök Valhalla Show Me Maste...