Let's talk about Magus
Am I the only one who is starting to find it rather odd that it's the AP jungle item which lacks the same flare and individuality that the others contain? Currently (on the PBE) Magus is the only Smite Enchant which has no scaling, no individuality, just some stats. Devourer scales with the +1 Magic Damage on Large Monster kill & +2 on champ Kill/Assist, Juggernaut has Tenacity, and Warrior gives +10% bonus AD (on PBE, so it is an AD Deathcap now), but Magus just gives +80 AP & +20% CDR. I guess one could argue about the CDR but it's not that hard to get with AP items.
Now I know you can't put a %bonus AP like Warrior does since mages already have Deathcap but what about leaning more towards utility? Something which can be just as appealing to an Amumu as it would to Elise or Diana (yes, Diana can jungle well). Something like a way to help restore mana as junglers typically can't afford Athene's Unholy Grail or Archangel's Scepter on a tight budget. Also before you go pouncing in the comments about "Just grab Blue Buff", that would just anger mid lane players. One possible idea would be something like "Mana Siphon: Whenever you cast a spell, X% of the damage you deal is returned as mana." or in other words "Spell Vamp but for mana instead of HP". I know it would have to be a low % like 10% but that would help out.
to it, but gaining stacks on monster and champ kills/assists?