Yet more beta changes to Mages(3)

Empowered Frostbolt reduced to 2 ranks, increases damage by 5/10% of spell power and increases critical hit chance by 2/4%. Flame Throwing moved to tier 3. Frost Channeling now reduces mana cost of all spells by 4/7/10%. Frost Warding now increases armor and resistances of Frost/Ice Armor by 25/50%, now gives Frost Ward and Fire Ward a 15/30/5 chance to negate damage caused and restore mana equal to damage caused by the warded spell. Ice Floes renamed Cold as Ice, now reduces cooldown of Cold Snap, Ice Barrier, Summon Water Elemental, and Deep Freeze by 10/20%. Improved Counterspell now always silences the target for 2/4 seconds. Improved Fire Blast moved to tier 1, reduced to 2 ranks, reduces the cooldown by 1/2 seconds. Improved Flamestrike moved to tier 2, renamed World in Flames, now increases the critical hit chance of Flamestrike, Blast Wave, Dragons Breath, Living Bomb, Blizzard, and Arcane Explosion by 2/4/6%.