Rampage Relic

I have found a bunch of relics, but the One I need for the Save I cannot find it anywhere. I farmed for days and still nothing.

Halfway through on elite campain now. Level 63 or 64. IF someone could tell me where it would spawn frequently, or give me a stash save with blueprint. I would appreciate it very much.

as of treasure trove drops the most blueprints.

5 hours of solid farming on Elite diff treasure troves, found tons of stuff, all except that dang gon relic ;/