So, if I understand aright, a Pungent Sunrise knocks 90 seconds off the time for the skill you're learning presently.
1 Favor point with the primary giant knocks off 10 seconds.
1 Favor point with a secondary giants knocks off 7 seconds.
A Pungent Sunrise lists at 197 currants, ergo 19.7 favor. Which is 197 seconds with the primary or 137 seconds with a secondary. Unrelated giants, I don't know about. And that's stock, without EHSP.
So what I want to know is: why would I drink a Pungent Sunrise instead of donating it and then using favor points? I mean, there's a little marginal stuff there about emblem limits, but realistically it's not too big a deal to keep 20 favor increments under the emblem mark, and you could always spend first and donate after. And, as a donation, Pungent Sunrises are as good as anything else, so why bother with making them in the first place?
I suppose, maybe enlightment buffs stack with favor speedups? I thought you could get to halfway in speedups and then the rest had to be learned, but if they stack, I could see the benefit.
All in all, my game-sense is confused and distressed.