i've said it before, champions like zyra and karthus and brand are just a trap for rito to balance ap junglers around
balance it around diana, elise and nidalee and fiddle and fuck everyone other ap champion
you belong midlane damn it
per tradition ezreal has to ruin one jungle item so might as well get it over with quickly
All the bolded champions work best in a more assassin oriented role. None of them are particularly strong right now and yet Runeglaive - between it's better raw single target damage, 10% CDR, and the low-ish CDs these champions have on spell(s) that increase the proc rate of spellblade - is the better item on them.
I guess Nidalee could make good use of it but doesn't this make her more
frustrating.. Instead of having to get in close to land an AA and proc spellblade her spears will now apply Echo when they hit at any range. That sounds fucking obnoxious.
You know your mids, right? Can you think of a single one that wants to rush Luden's Echo? I'm legit asking, because I sure as shit can't. I can think of several champions who might eventually pick it up, particularly low CD poke specialists like Ziggs and Xerath but that's after they've picked up the good chunk of CDR that's necessary to make the best use of Luden's since the base and scaling damage on the Echo proc aren't anything to write home about.
So if you think of the jungle items as "poor man's" version of better items, each of them is associated to an item you could legitimately see as the first completed item. Warriors is Youmuu's, Cinderhulk is Sunfire, Devourer is Rageblade (kinda, Devourer has its own thing going on), and Runeglaive is Lichbane...
No one rushes Luden's in lane.
The change out and out isn't awful. The change from Magus to Runeglaive put some AP junglers out to dry while pushing some that were fringe up quite a bit. Runic Echo isn't going to suddenly make the current crop of AP junglers disappear, just make them not as good, so it's got that going for it, but it isn't going to bring up a whole new cadre of AP junglers up either. Magus -> Runeglaive was a lateral shift, I'm worried Runeglaive -> Runic Echoes is a small but noticeable net negative.
Unless jungle Ziggs is something I'm not aware of at the moment.
As far as Fiddle goes...
Fiddle?
Based on the fact that it coincides with a buff to his ult I just assumed they wanted to give him some love.
Even when Magus was the AP jungle enchantment high elo Fiddlesticks players would skip it and rush Zhonya's. Fiddle's base damages are so good that the utility provided by having Zhonya's active available as soon as possible outweighed the benefit of more AP.
Magus was a poor man's Morello's - an item that Fiddlesticks could actually use properly - and experienced Fiddlesticks players still skipped it. Runic Echo is a crappy Luden's, an item that Fiddlesticks doesn't use very at all, so those good Fiddlesticks players are going to do the same thing as they did with Magus and as they currently do with Runeglaive - skip it.