I've defeated the orowyrm in lone story, completed 8 cycles of the circuit, [EDIT: I meant 8 stages. Since posting, I have fully completed 1 reward tree before weekly reset] and the core duviri experience 3+ times all on normal. SP still hasn't unlocked for me. I've done all of this across multiple different moods, several times over. All to no avail.
This is getting rather frustrating.