Arrow is attack speed +10%. It does not affect ability cooldowns. It affects spell/weaponskill casting times and cooldown speed and auto attack speed. The Spear card affects Ability cooldowns (Dignity, Light Speed, L. Aether, etc.) and the Spear card's -20% cooldown effect only takes effect if you use the ability under the Spear buff. If you activate L. Aether before applying the Spear Card onto yourself, your cooldown will not be lowered.