@grey-maybe counted 0.71% for specific ring so no Sethris in 232 runs is like 19% so pretty unlucky but reasonable. But then if we include that you got neither Sethris nor Orissia in these 232 it drops to a few % (don’t know exactly) which is unfortunate but still in the realms of possibility.
By the way the expected runs for getting a pair of legendary Alkamos rings was 1/p + 1/q - 1/(p+q)
I calculated the formula for 3 items and it’s
1/p + 1/q + 1/r - 1/(p+q) - 1/(q+r) - 1/(r+p) + 1/(p+q+r)
It’s most probably the same for more items so let’s use it to find expected runs to get the full Lokkar set
Lokarr’s Boots (Level 1)27.78%
Lokarr’s Coat (Level 1)22.22%
Lokarr’s Gaze (Level 1)27.78%
Lokarr’s Mantle (Level 1)22.22%
1/p + 1/q + 1/r + 1/s - 1/(p+q) - 1/(q+r) - 1/(r+p) - 1/(p+s) - 1/(q+s) - 1/(r+s) + 1/(p+q+r) + 1/(p+q+s) + 1/(p+r+s) + 1/(q+r+s) - 1/(p+q+r+s)
1/0.2778 + 1/0.2222 + 1/0.2778 + 1/0.2222 - 4 * 1/0.5 - 1/0.4444 - 1/0.5556 + 2 * 1/0.7778 + 2 * 1/0.7222 - 1 ≈ 8.5
The expected number of Lokkar Kills to get the full set is 8.5