What artifacts should you upgrade and get from the shop in Invincible Guarding The Globe? Good question with quite some consequences when you look how long it takes and how much effort and resources goes into an artifact, right?
I see so many players simply put everything into the artifacts they have but please take your time and rather stockpile up artifact XP and ait for the good artifacts than blindly upgrading any artifact! They have very different impact and worth waiting can go a long way here.
Although I have specific artifact recommendations linked in my tier list for Invincible GTG here, what are in general the artifacts that you really should invest in? Below you find my general ranking that should give you a pretty good idea about that.
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Conclusion
I really hope this list helps you to avoid major mistakes with your artifacts and if you want more specific info what artifact works best on what hero, just check out the above mentioned tier list that has them linked.