I know they were never meta, but manaless AP junglers will have no viable build path
While they were never really meta, Jungle Akali, Rumble, and Kat were niche picks and viable in certain situations because Magus didn't have mana or mana regen attached to it. With the removal of magus and the addition of runeglave, they will be completely unviable and have no build path. Now their AP jungle item would be incredibly gold inefficient on them, which is the opposite of what the jungle item should be.
jg works suprisingly well. Her spellvamp keeps her HP at decent levels and you get to skip her trash laning phase. Once she gets to lvl 6 her ganks are lethal.