Ap junglers are simply not doing well now. The reason seems obvious. Runic Echoes 
is inferior to other jungle items 
. It offers less power than the other jungle items, and that is key for their early game. However what runic offers is less power, for infinite mana, which isn't really needed anyway when there is blue buff in jungle.
I tend to agree.
Runic Echoes is garbage.... the only good part about it is the movement speed, I'd rather have Runeglaive. It was WAAAAY better.
You completely missed the reason why both tanks and APs struggle in the jungle right now. It has nothing to do with Echo's or Cinder even if these items are slightly weaker than Warrior specifically. The main problem is the fact that there's an item that exists purely for AA centric junglers. The thing that drove AP and tank junglers out of the meta was the splitting of Machete into the new Machete and Talisman leading to AA junglers having far better clears than spellbased junglers, as if they needed help with that.
