I'm starting to think GX characters cant gain skills from dueling Rex 40-done 1716 games with Jaden and reached over 8000+ and not gained a single skill yet? Can any one else confirm if this is the case?
Here is my statistics for 20 times X8rewards:
pegasus vs misawa40:got 6 rainbow box out of which 2 skill, 76 gold box out of which 3 skill.
pegasus vs misawa30:got 4 rainbow box out of which 1 skill, 40 gold box out of which 0 skill.
pegasus vs keith40:got 7 rainbox box out of which 0 skill, 61 gold box out of which 1 skill.
It seems that result fluctuate and depends on characters
My statistics differ a lot from a Japan site which said EIGHT skill for 20 times. Probably the rate drop a lot after GX update or probably depends a lot on characters.
FYI, the Japan site said for 20 duels of 8 rewards: LV40 drop 8 skill which LV30 drop 3 skill so it is better to do LV40. However, the drop rate is marginally different and there is huge chance of mere statistic phenomenon since sample not large and it is highly probable to be character dependent. Rival characters may be better.
Its just rnd dudes. Just farm all the lds when you see them. Why bother with such statistics? My suggestion is don't farm for the sake of getting skill, just aim for the loot.
Japan site drop rate for 20duels 8 rewards:LV20:0; Lv10:1; and conclude that LV40 is best. However, statistic inference from small sample like this is not reliable. No one has such a lot keys to do big sample. I later add Pegasus vs Keith30 test result. Not much keys left.