For everyone who's saying "Onslaught is impossible, NERF!!!"
I mean Seriously...It's not even week passed from the moment mode was enabled, and you already gave up...I passed it in 1st attempt(was in full premade) and can't understand you.Have you ever played PvE online games? EVERYONE OF THEM REQUIRES COORDINATION AT HIGH LEVELS.And riots did really well that onslaught acutally needs you to use your brain,reaction(in terms of dodging) and most important make up a strategy and execute it right.It's a teamgame, and this mode actually designed for TEAM as any other PvE in high difficulty.For example, try to complete mythic with pugs(there is a little list of addons\options to do that), even if you'll have skill, knowledge,gear, without proper raid you won't be able to do that, and this is RIGHT.They give you 3 attempts per stage, so you can reconsider your tactic, your action, learn from your mistakes, They actually giving you chance to improve and go further.
Personally i really thank riots for this mode, it's really interesting and difficult, not just unskilled grind, and need some skill and practise to pass it, which makes it very interesting and challenging and please, don't nerf it.People will learn later.it's winnable, but not easy, which is way it should be.Thanks for your time(and sry for my bad englando)
P.S.https://imgur.com/MoPiyyN [slayer-jinx-catface]