How to notice that jungle items are poorly designed:
The vast majority of jungler upgrades smite, but skips the jungle item for something useful. The only enchantment worth an item slot is warrior.
Jungle items maybe cost efficient, but ironically they're useless in the jungle. There are better choices.
- MR items were nerfed, Mercs are a must buy on tanks anway. Why waste money on a doubled stat?
- Magus doesn't help with mana sustain and simply delays an actually useful item like Rylais, Liandry's or Morellonomnicon.
- Devourer was nerfed incredibly hard. Most AD'lers are better off with Warrior. Jungler's like Lulu or TF are not viable anymore (after nerfs to this item) anyways.
Please Riot. Do something about these horrible items.
You could at least start by adding increased health and especially mana regeneration to compensate for the more durable monsters.
every single time I jungled last season. Why? Cause it was OP.

? this item makes freaking beasts out of them (well, most of them already are beasts, but you know what i mean)
instead.... you're doing something wrong.
; stats on enchantments ranging from "generally pretty sweet" to "meh, I may buy it later."