Stuns n Bosses need reworked badly

So i'm a lvl 91 ritualist I can't get past lvl 91 because boss encounters are absolutely ridiculous.

I have a lot of ES and life, and do incredible damage im following a build that does 2.5 mil damage once its complete.

However I keep getting one shotted by tier 3 bosses. I keep losing all my xp I can't progress any further. They really need to nerf the boss damage as a whole.

Let's talk stuns. So the way a stun charm reads is immune to stuns when used!

On my ritualist i'm using the ascendancy that uses yor mana if you have no charm charges to fuel it so you have unlimited charges (supposedly).

When you get hit by a monster that stuns you in fact are not immune to light stuns, only heavy.

You still get stunned if you get a map with mobs that stun and they get to you even when supposedly being immune to stuns when you use the charm.

The multiple hits from the stunning mob still freezes you for a split second and interrupts your atack which is getting me killed over and over and over.

Charms need to work like worded if immune that should be immune to all stuns light and heavy if not you should word it (Immune to heavy stuns when used)

I understand you want the game to be challenging but when you can't get past lvl 91 and get stuck there for a week playing 8 to 12 hours a day there is something very wrong with your game.

Nothing like running through a map killing stuff then a monster corpse explodes stuns you and poof dead, when you are killing everything with ease that should not be happening either.