Let's give Magus the Cinderhulk treatment
Jungle Diversity
I just want to state right off the bat as a diamond level jungler the latest changes in 5.5 have been great for jungle diversity and I have seen more off-meta/experimental picks in ranked then I have seen in a long time.
Why were the cinderhulk changes so effective?
Obviously this boon in jungle diversity is largely a result of the release of cinderhulk and what it did to solve problems that tank junglers had at various stages of the game. It gave them the early to mid game clear they needed to stay relevant in farm with bruiser junglers and it gave them the late game scaling they needed to truly be a tanky frontline in teamfights.
Lets look at Magus and AP junglers on patch 5.5
Most people will probably agree that Warrior and Cinderhulk are in a pretty healthy spot right now but I believe Magus is really is starting to pale in comparison. Let's look at Diana for example, a champion who has been surfacing in the meta as of late. Diana has a shield for sustain, a strong camp clearing passive and strong ganks at 6, on paper she should be a viable jungler. If you've ever tried Diana in the jungle you will notice right off the bat she feels very good early, your first clears will be relatively painless and very fast, your gank pressure is a little underwhelming but you can make up for it by powerfarming to 6. However after your first clear and your blue buff runs out you will start to understand why you never see AP champions in the jungle.
Ap junglers like Diana suffer from brutal mana-gating without blue buff, while they clear fast with blue buff as soon as it runs out their mana pool is gone after one or two camps and their ability to farm or gank is completely non-existent. You are forced to run trailblazers and steal every blue from your mid-laner to stay relevant and even then you still face crippling mana problems during blue buff downtime.
The issue with Magus
Magus is a great item; it grants 80 ability power and 20% CDR which is a fantastic powerspike for the price but it has one glaring weakness; it does absolutely nothing to prevent AP junglers from simply going OOM and becoming useless until they base. As it stands right now the only viable way to play Ap junglers is to go RoA/Tear/morellonomicon out of the jungle all of which have particularly bad and awkward build paths for a jungler and also delay your core item build even further.
Junglers also want early power spikes to have an impact early in the game where they are the most relevant and building mana heavily delays that. From a counter-gank or 1 v 1 perspective the jungler who brings combat stats to a fight is going to win every time over a jungler who brings mana; it is simply wasted gold that brings nothing to a fight.
How do we fix Magus?
Honestly just revert it to the old spectral wraith that gave it mana vamp - it was perfectly healthy on mages back then the only ones who abused the spirit stone passive were primarily AD bruisers. The cinderhulk enchantment afterall was more or less simply a reversion to the old juggernaut which had the 25% max hp passive with thorns to return damage to the mobs (essentially the same dps to mos as immolate on cinderhulk).
Magus's powerspike might be a bit loaded with a mana vamp passive so perhaps just bring back the old stacking mechanism (similar to seeker's armguard but on jungle mobs) or nerf the CDR/AP on it slightly to compensate. Changes to Magus would not only help AP mages in the jungle but also AP off-tanks like Amumu, Maokai, Cho'gath and others who suffer from mana issues. Also for clarity sake make the mana leech only proc on neutral monsters so midlaners can't use it obviously.
TL:DR AP junglers suffer from being mana-gated in the same way tank junglers were being DPS-gated when it came to competing with the clear speed of warrior enchant bruisers. Give magus it's old mana-vamp passive back.
EDIT: As cost-effective as Magnus may be over warrior; Warrior gives flat AD which boosts both abilities AND auto attacks while AP simply only boosts ability damage. This is why warrior has a stronger clear unless AP champions have more liberty to spam their spells when clearing.
Edit(2): Someone has suggested adding a % of your ap to auto-attacks when upgrades to prevent junglers like Fiddlesticks from abusing the mana-vamp
Edit(3): Another suggestion was adding a flat amount of mana refunded when killing a large jungle mob (think swain passive). This flat amount could scale with levels and would prevent junglers like fiddle/Elise/Nidalee from getting too out of hand with a damage to mana conversion passive.
with Warrior, and his autoattacks actually do damage then. How the hell is a
or a
or a
supposed to compete? How are any of them supposed to do ANYTHING without a blue buff?
can work with it is because she has 3 (damage; technically 5 total) spells THAT DON'T USE MANA! And she can still go low!
, and besides, there's more champions than junglers who need more item choices to handle mana issues early game.
, but i could be wrong there).
, that's what it's there for.