Druid · Balance · tier 4 · from level 25
Improved Starfire
+17.7 Starfire
5/5 · level 60 · per second of casting
Improved Starfire
Rank 5/5
Reduces the cast time of Starfire by 0.5 sec and Starfire has a 15% chance to stun its target for 3 sec.
Averages, counting crits and misses, for a level 60 Druid with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.