>>531971859
75 years, so 75 cycles.
Each cycle takes 6 days (8 days base, but every one after the first is 25% faster)
So that's 452 days total, or 7.5 years doing nothing but age reversals.

Anomaly's Chronophagy lets you siphon youth from a prisoner with some evil metal on a 5 day cooldown. Pic related for both a well performed (but by no means perfect) ritual and some basic shit you can do with just starter pawns.