Kayle getting the ability to use Both Runaan's Hurricane and Ravenous Hydra
Ok, I've seen this build coming in lately and looking back it's something from S4 it seems when they items were first introduced and I believe before they were made Melee/Ranged only. Now Runaan's is current Ranged Only, and Ravenous is Melee only. Most champs don't get the bonuses from them unless they fit that classification however thanks to her ability that EXTENDS her MELEE Attack range Kayle seems to be classified as BOTH. She gets the extra bolts from Runaan's AND the extra AOE from Ravenous when using her W I believe it is and also it gives an AOE dmg similar to Ravenous as well so that's a lot of minion clearing she can do not to mention massive AOE in team fights. Adding this to her kit which includes a ranged slow, a heal/speed boost, and an Ultimate that makes her or target Immune to all dmg and CC for about 2-3 seconds and you have someone doing a shit ton of damage that you can't really get away from or kill that easily.
I personally think this is a bug that she can access 2 of the ONLY items that are restricted to be used by Melee or Ranged only but I'm sure most everyone will scream that it's just how she is cause she's "both melee and ranged" even though a champion that swaps between them, Jayce, doesn't get that nice buff and instead has to get only 1 bonus at a time when he's in each mode.
and
running around 1 shotting people AFTER the assassin rework is a much bigger issue than kayle maybe being able to use ravenous and ruunan's.