Unplayable AP tanky junglers
Junglers like amumu are currently unplayable. I've been playing amumu over 4 years and I can't remember him being this incredibly useless ever before. Very squishy, still with a huge mana problems, no summoner spells cooldown reduction mastery (except that possible 5 % which is only 15 secs down from flash, that's kind of nothing) , but especially now you can't do the whole jungle clear in the beginning.
I used to use mostly 2 rune pages on amumu:
Full armor rune page: finishing the first full jungle clear with pretty much full HP, even though slower since there is no AP in runes. If I get invaded, I can easily walk out or at the most, use flash for it. Very great against aggressive junglers like Lee Sin.
25 AP, 8 magic pene, 8 armor (IIRC): VERY fast jungle clear, most of the time blue buff -> wolves -> raptors and ganking top/mid with level 3 at ~2:30, while dealing a lots of damage. Great when you need to gank a lot, while also wanting to have a strong CC tank in the late game.
The situation now:
- Clear relatively fast 3 camps, then you must go back to fill HP, since you are under 40 % (with recommended starting items)
Alright, mana's always been a problem with amumu. His mana costs has always been ridiculous, that would be for another topic. But with these new runes, the champion is unplayable, I feel like they really aren't designed for champions like amumu.