Mage · Arcane · tier 1 · from level 10

Arcane Focus

+31.8 Arcane Missiles

5/5 · level 60 · per cast · and 2 more

Arcane Focus 12345

Rank 5/5

Improves your chance to hit with Arcane spells by 5%.

Arcane Missiles +3.1% +31.8 Arcane Blast +3.1% +12.0 Arcane Explosion +3.1% +7.6

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