Item concept : Coat of the channeler (armor, ap, cdr, mana, mana sustain)
Actually there is 3 armor ap item item in the summoner rift : Seeker's Armguard
, Zhonya's Hourglass
, and Zeke's Harbinger
:
-Zeke's Harbinger is a terrible first item choice for a solo laner since the stats are medium and you can't use the passive
-Zhonya's Hourglass cost and build path make it harder to rush and mage with mana issue will have tough time in the lane
-Seeker's Armguard is a good item but can only be built into zhonya and some mage don't synergise well with zhonya
So i imagine a starter item to soften the early game versus AD opponents.
Coat of the channeler :
- 60 ability power
- 30 armor
- 250 mana
- 20% cooldown reduction
- Unique passive, Mana channeling : when your abilities hit an enemy/ally restore 7% of your mana max (20 sec cd)
- Unique passive, Mana excess : -when you have more than 75 % of your mana, half the mana regen (both from base regen and passive) is transfer to a shield (10-180 max hp). -when you are under 75% of you mana pool, the shield will dissapear after 25 sec
build :
Glacial Shroud + 
Fiendish codex + 
Amplifying tome + 615 gold
total cost : 2850 golds
stats value : 3005
gold efficiency : 105 %
So, the build path is really smooth only the final upgrade cost more than 500. The player will have to sacrifice a bit of ap to get the defensive/utility stats (compare to Morellonomicon). The passive shield is only efficient is you play defensively since you won't keep it if you spam spell.
Note : all number are just to get an idea of what the item would be, some if them may need some balance in order to make it fair/viable
Thank you for taking the time to read it, hope you liked it
Have a nice day.
