I made a video recently on how to farm legendary mod components! The original source of who found this guide was Ninja Pups so make sure to watch his video also! :)
The only requirements for this farm is lvl 50 with the vanguard then the rest is simple!!
https://www.youtube.com/watch?v=oBJpznEe4Uk
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Personally I rather I have the legendary shards and vanguard tokens Those are much more valuable in getting new weapons with mods already on them and random rolls I wanna rank up my vanguard for new stuff