My 4 artifacts are all Lengendary. They are Triple Strike, Army Camp Boost, Time Warp, and Supercharge Army Camp.

Should I make some changes to these?

What should be my first Insane artifact?

Thanks for your help.

You should aim to get an Alloy Values first, and then an Army Cache Boost (A$B).

AV work good enough at Legendary, so i would recommend the A$B as first Insane.

Yes. Get legendary (or higher) Allow Values artifact. Without it, you are missing so much potential

Thanks for the tips.

Should I give up the Supercharge Army Camp for the Alloy Values artifact?

If not, which one?

In case you haven't, google market strategy.
Also you will need this maps and info
https://pkmx.github.io/wzi-levels/

If you only have those 4 artifacts atm, then i suggest you do as many 100% common digs as possible, so you can find the artifacts you want asap.

But you probably have a bunch more artifacts of lower rarity?

I do have an Epic Alloy Values artifact. It will be some time before I can improve it to Lengendary. But I will work toward that.