Trouble getting spells for BLU.

[Daralii]

I've heard this one, and some say the number of BLUs do not matter. If anything, these are all pure speculation. Even at the rate I got the primal spells, with 4, 6 or 7 BLUs in the party, I felt I was getting them at random.

For example, I did Shiva ex with 5 other BLUs and 2 non-BLUs and it took roughly 40 runs total. I did Titan HM in a party of 6 other BLUs (1 non) and never got it. We did like 40+ runs. Then I duo'd with a friend and I was the only BLU and got it on our second attempt...

Would there even be a way to find out if the game does a single roll or rolls individually for each player? I assume it's done server-side, so datamining wouldn't cut it.