AP - CDR Item suggestions
Void Cloak
+ 
+ 
+ Gold
100 AP 15 MR 15 Armor 10% CDR Unique Passive: After dealing spell damage gain 20 Armor and 20 MR for 3 seconds.
Overload Staff
+ 
+ Gold
80 AP Unique Active [Toggle-able] : Upon casting a spell, gain 10% (15% ?) cooldown reduction, increase your spells mana cost by 8% and gain 15 ability power for 4 seconds. Ability power can be stacked up to 4 times, and mana cost stacks up to 4 times.
( 's passive in "reverted" when the item is combined, making it increase mana costs, making it a transitional item for mid-lategame, unless you choose to combine it early for burst of ap at the cost of sustain)
Staff Of Attunement
+ 
+ 
+ Gold
100 AP
10% CDR
Unique Passive: Whenever you deal spell damage, gain mana equal to 10% of the damage dealt.
Lich's Mask
+ 
+ + Gold
100 AP 10% CDR 15 Magic Penetration. Unique Passive: Whenever your health reaches critical levels, gain a shield that absorbs 200 damage for 5 seconds, 40sec cooldown. Unique Passive Lich: After casting a spell, you next damaging spell within 4 seconds heals you over 4 seconds for 40% of the damage it deals, 8 seconds cooldown.
Sendir's Gloves
+ 
+ + + gold
300 HP 80 AP 50% mana regen 15 magic penetration Unique Passive: Gain (10 - 15 - 20% ?) CDR as long as you have a DoT effect on a target.
Haunting Tome
+ 
+ Gold
80 AP
7% Movement Speed
10% CDR
Unique Active: After 0.75 seconds, fire a straight line ray that stops at the first enemy champion it hits (1200 range), dealing 15% of the target max hp (+30% AP) as magic damage and slowing him 40% for 2.5 seconds.
