I've just started building my first 2-sphere decks, and arbitrarily picked Leadership and Spirit. I guess I'm doing okay, but what I wonder if if there are known "good" and "bad" combinations of spheres.
For example, it seems to be common knowledge that Tactics is pretty awful by itself. Which of the other 3 spheres is most likely to "help" it?
Is the effectiveness of certain spheres (and sphere pairings) scenario-dependent? Or are there good general combos?
Also, do the new player cards in the adventure packs radically alter the spheres' strengths, or do they simply add more variety?