Should be x25. 8 slots and every prime = +2. 50 lvls / 2 = 25. 25x8 =200 primes but that’s optimal and you get everything in the correct slot all the time but that will never happen. Avg. around 20 runs for a prime. So 200x 20 =4.000 runs. But since not optimal it will be more runs it requires on solo ops. You can do other activities but in general they take way longer. I don’t know what Bungie thinks but probably the idea is to spread it out as much as possible to keep players plaing. But with a boring long annoying grind they should realize players will not play longer but players will leave.

Now primes are +2 it'll take a lot longer than the old 400-450. 1 drop every 20 (it's much worse but hey) - 8 slots x 50 = 400 power needed, that's 200 primes (if perfect, which won't happen) 200 primes x AVG 20 runs that's 4000 completions of perfect rng, AVG runs 6mins, 4000 x 6 A= 24'000, 24'000 mins = 400 hours, 400 hours IF perfect rng so maybe double that. Actually terrible design