How can I farm Strand currency fast and efficient?

[winter monolith]

Can anyone help me out please?

[winged shell]

weekly nimbus challenge, terminal overload, patrols

[winter monolith]

Alr also if you can help me out with another thing, how can I open defiant chests? Since I have 5 defiant keys

[unreal island]

@winter monolith neomuna harbor there is cave to right of spawn in that vex constantly spawn in defiant battlefields is where you use keys visit helm and reacquire artifact for gear and weapons

[winter monolith]

alr thanks