I need to do Inventory Cleanup this weekend

[SnowBlack&D7BBC]

Recommend me Legendaries I should keep going into Final Shape

[Kopejka]

It depends on what you have.
And honestly like 80% of weapons in that vault will never be touched, so just dismantle what you don't like or never used or never intend on using. There will be many more weapons that will come out, so no point holding on to old stuff other than sentimental value.
Look up some popular rolls of weapons you have on light gg and start from there.

[Mez Koo]

You're the only one that knows what you like, if you need inspiration then search datto vault cleaning on YouTube but NOTE: SUNSET GEAR WILL BE UN-SUNSET NEXT WEEK if you have any in your vault, still not worth keeping most sunset gear though as most has been power crept with new alternatives.

[GS_GerBeGurGya]

We should get an additional 100 space with the update so I wouldnt bother cleaning.