Shaman · Restoration · tier 2 · from level 15

Tidal Focus

+13.3 Fire Nova

5/5 · level 60 · per cast · and 11 more

Tidal Focus 12345

Rank 5/5

Reduces the Mana cost of your healing spells by 5% and improves your chance to hit by 5%.

Fire Nova +3.1% +13.3 Flame Shock +3.1% +10.5 Earth Shock +3.1% +9.2 Frost Shock +3.1% +8.8 Stormstrike +5.6% +6.8 Attack +5.3% +6.8 Lava Burst +3.1% +6.7 Lightning Bolt +3.1% +6.1 Lightning Shield +3.1% +5.4 Chain Lightning +3.1% +3.9 Magma Totem +3.1% +2.2 Searing Totem +3.1% +1.4

Averages, counting crits and misses, for a level 60 Shaman 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.