I've been tracking the percentages of each rune you can get from the various chests for about 5 months now, and have been posting the results in the following post: https://forums.socialpointgames.com/topic/11762/rune-chest-percentages
What I have come to find is that for the 3-5, 4-6 and 5-X chests, the percentages are significantly skewed to the lowest value rune:
Level 3-5 Rune chest (168 total chests)
- Level 3 Rune: 165 (98.2%)
- Level 4 Rune: 1 (0.6%)
- Level 5 Rune: 2 (1.2%)
Level 4-6 Rune chest (122 total chests)
- Level 4 Rune: 120 (98.4%)
- Level 5 Rune: 1 (0.8%)
- Level 6 Rune: 1 (0.8%)
Level 5-X Rune chest (43 total chests)
- Level 5 Rune: 43 (100%)
- Level 6-X Rune: 0 (0%)
Did the developers really intend to code/configure the rune chests in this manner? It seems way off from what I would expect.