To me it looks like a completely custom set. So, for the chest and waist, I'm thinking something close to relaxed fit, boots definitely look like Ancient Infernal Boots, the shoulder spikes and gloves definitely look like Reavers Armor Set. Just to let you know, so you don't buy more packs or equipment than necessary, the Reavers boots are very similar and look even better IMO than the ones in the video.