Where is best place to farm legendary relics?

I failed to get the one I wanted, mag size and victory rush during the event. Where is best place to farm them currently? It seems like they drop more from graveward and almost never in slaughter shaft.

Icewoman/Graveward and any hunt creature is where i found most.

i have about 20 of them, all for Zane though. If you never find one let me know, i might be able to help bro