His highest may be 53 but between 3 characters has had 70 Dead Orbit packages.
Rank doesn't actually factor in getting a shader.
I got Hanged man at 4, Bittersteel at 8. I'm now 45 with no other notable drops. No revenant yet
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But he is yet to hit rank 70
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Actually only 64 because you don't get packages from levels 1 and 2. But yes, technically speaking he is not yet rank 70.