There's plenty of room to make the non-devourer enchantments stronger.
Honestly having strong jungle items is cool. It gives a role that generally has less experience and gold income than laners a good boost. That being said, devourer is just wildly more powerful than the other enchantments at the moment and for no good reason. Right off the bat it's good, even before sated, offering 30 magic damage on hit, which honestly makes it a better cinderhulk because your AS will be 1.0 or higher by the time you buy it. (30 magic damage every second vs 15 +0.6Xlevel per second). So there's not only the ridiculous power difference when sated, it's still just as good as the other enchantments before being stacked at all.
Even though warrior is fairly gold efficient, it's absurdly slot innefficient and barely gives anything extra when fully built. It's 30 on hit damage + one of the best passives in the game vs 20 AD.
So I'm just struggling to figure out why devourer has a solid early game with an obscene lategame. It's not trading much.
We need to either add more variety to enchantments or capitalize on the selling points of the non-devourer enchantments. First of all, start by reverting the cinderhulk nerf. The champions who were strongest with it (Gragas, Sejuani) have already been nerfed, and the best tank items such as frozen heart have also been nerfed. It's safe to bring it back to the way it was. Then, offer either more AR Pen or CDR on warrior. Maybe we don't need to give Warrior tons of AD and make it generic to make it viable. 20% CDR or +20 armor penetration would set it apart from other items and keep it from being a worthless waste of a slot lategame. Also just bring magus back altogether. We know that devourer and warrior exist because different champions make use of different items. Why can't Riot realize that different mages make use of different items too? There's nothing wrong with having RUneglaive and Magus as options.
tl;dr devourer is very obviously the best enchantment. After recent nerfs and adjustments cinderhulk can safely be unnerfed and warrior should be looked into for buffs to components other than raw AD such as CDR and AR Pen. Also there's no harm in giving mage junglers options so bring back magus to be alongside runeglaive.
