My friend, you are all over the place with your reasoning and your posts. Let us look at what you posted here again:
Where are you even MENTION about Mages here?
You are complaining about GUARDIAN 300K peak damage. To get this they need to COMBO and build up damage.
You are complaining about DHAN 150K peak damage. To get this they have to be able to hit you while you are standing ikn front of them.
MAGES? What horrible damage are they doing to you? Why do you think you need to 1-shot them? They can't 1-shot you! Yes, they are annoying. They are supposed to be annoying! Otherwise who would want to play one?
If you EQUIP your HE right and PLAY it right, you would have no more problems than a dhan or guardian playing this game.
The game is changing. Learn how best to make use of those changes.
IMHO A ranger hitting 40K per shot at 4 shots per second is damn deadly.