Spirit-World Glass and a Darkmoon card: Blue Dragon make a fantastic combo if you are in need of manaregen. The blue dragon is very unreliable - sometimes it procs ten times during a fight, sometimes it just never procs - but overall, if you add the buff in power auras and use your spirit trinket accordingly, you will get 15 seconds of extremely boosted mana regen; which is utterly fantastic. Darkmoon card: Greatness might even be better than the Spirit-World Glass, but I like to retain some control of when I need mana