Talk:Loki/@comment-155.145.195.135-20190520083131/@comment-212.124.174.56-20190605124922

Right to the point:

-for rushing missions in easy mode without being bothered and detected (especially spy mission and rescue)

-he was once very popular and "top tier" due to the raid Law of Retribution, now removed, where basically all of his ability and stats where a perfect fit for what the mission required ( high energy pool, high movement speed, decoy for especially the last bossfight, invisibility and radial disarm for amazing cc).

So in the end the thing he is most efficient at is making some missions pretty fast and easy everything due to his invisibility. Everything else is negligible, just in terms of efficiency/ compared to other warframes.