It doesn't really matter. If casters are still completely owned by a Banshee's Veil then it's still effective to get one. Banshee's and FoN are already great MR items, Banshee's main value I find is in the shield and still provides a good amount of MR. FoN isn't as great, health regen isn't that appealing, but it does provide some movement speed along woth it's MR.

Problem - If mages wish to itemize in order to obtain 40% cooldown reduction, the only ways to do it without a use of 2 item slots is 9/0/21 (which they should use anyways XD), CDR blues, and either Blue Buff, Nashors Tooth, or Frozen Heart, which both have lackluster stats for most mages ***(Nashors Tooth has Attack Speed which most mages will never be using, and Frozen Heart only gives armor and mana, and mana is the "worst" stat to have late-game, especially since most mages will get Banshees Veil and Archangels, solving any and all mana issues.)***, or to use something like Deathfire Grasp and Blue Buff, however not all mages require something like Deathfire, so sometimes that too can be a lackluster choice. My suggestion will attempt to bridge the gap between AP cooldown reduction items, and Support cooldown reduction items.

Solution -

Item with a cool name (i'm bad at names, my apologies, and I hope this doesn't negate my suggestion)

Component Parts -
Fiendish Codex - 1245
Soul Shroud - 2105
Recipe - 650
Total Price - 4000

Stats -
+600 health (A small upgrade from Soul Shroud, which is what this item will be focused on, small upgrades to the components that add up to a fairly powerful new item.
+50 AP (This is possibly the largest upgrade in the entire item)
+10% Cooldown Reduction (Because 25% AOE CDR is WAYYYYY overpowered in my eyes)
Unique Aura: +20 Mana Regen/5 Seconds (just combines the two and adds an additional 1 because 19 is such a terribly odd number)
+15% Cooldown Reduction


This is my item, in my eyes it is a good item on heroes such as Zilean or Janna who benefit from Cooldown Reduction more than anything, but AP helps them out.

This is also a good item in that Fiendish Codex is a fairly good early game item, providing mana regen, as well as Mana Manipulator -> Soul Shroud rushing is good for the bonus health on those heroes who love cooldown reduction.

Thoughts?

The problem is : High bursters doesn't care about a Banshee Veil. High Bursters assassin's like Akali, LeBlanc, AP Shaco, and even some casters like Vladimir doesn't really care about your banshee veil cause they can spam you their spells. The problem is not with classical casters, but with bursters spamming.

Casters never have been completely owned by Banshees. There is always someone on the Team that can effectivly clear it. It´s value is that this clearing is rarely compatible to a strong initiation. Tanks don´t need to protect themselves from being initiated upon (try pulling a Amumu with Blitzcranks grab. Hilarity and Despair ensues). If a Tank wants MR nowadays he wants it because of Kog´Maw with Bloorzarors, not Veigar.

The problem with Force of Nature is that it´s 76 MR for 2175 Gold while two Negatron Cloaks would be 96 MR for 1480 Gold. The HP and Movementspeed are very expensive stats that Tanks often don´t really need. If you DO need them fine, the item itself is fine but there should be some alternative high end MR items.

There are no early spell vamp items when they have any use at all.

The staff of SV
400 gold
grants 10% spellvamp
There would be spell vamp before building hextech revolver

1) Problem: Mundo goes where he pleases.

2) Inflatable Doll. 500g.

3) Place an Inflatable Doll at target location. Upon Mundo encountering the Doll within 700 range, there's a 50% chance he will grab the Doll and make for the nearest Bush. Though you cannot stop Mundo from going where he pleases, perhaps the allure of Inflatable Doll will distract him long enough while he "pleases" himself.

4) ???

5) Profit.

Too bad literally nobody would take that one over anything else.

Problem: No (superior) counterpart for Sunfire Cape!

Moonshard Manteau
Ingredients: Glacial Shroud + Negatron Cloak + 1000 Gold (3415g total)
+475 Mana, +50 Armor, +50 Magic Resistance
UNIQUE Passive - Reduces ability cooldowns by 20%
UNIQUE Passive - Converts 20% of total armor and magic resist into AP. ([Armor#+MR#=Total] / 20% = bonus AP)

I thought this might've been a good idea for an item, but then I thought it followed way too much towards the tanky DPS meta.
This might be a great item for casters, since this can give some AP, some survivability, and CDR.

Nice Item Idea I love it ^^