kajsid

Everything that you have said so far is either an intended feature on the boss fight or a bug (like the destro still hitting the boss). That bug causes them to avoid the suction that disables skills, but if I remember correctly when the bug happened to my destro, the spacebar mechanic still applies. Correlation does not imply causation. I also agree that there's a lot of issues with this game, but for the most part, Koldrak is not one of them.

Next time you do Koldrak, during the first spacebar button mash phase, have a look at the boss' HP before and after. If enough people hit the spacebar, you gain a buff that allows you to do more dps and the boss loses a certain amount of HP. It's not a coincidence that HP difference happens to be around 200 million. It's a good idea to understand how the boss mechanic works before spewing out random theories.

To add onto the comment about the CPU, the game needs a very high clock speed just to perform at a mediocre level. Just to give some perspective, I have an i7-7700k (around the same generation as your CPU) OC to 5GHz which almost removes all the stutters but can still get the occasional 10 second freeze in MSP. Any CPU with a lower clock speed isn't going to perform any better, so it's not really to do with how old your CPU is relative to the game (although newer CPUs that can OC at higher speeds have a marginal advantage).

If things haven't changed, you need to level up to HM13 before you can access Moon Refuge.

This comes from the unity stone set effect. You probably have a set effect of at least 480 points, which activates the blue mist. Just take off some stones until you reduce the set effect to below 480 points. Edit: You can also turn off the effect by pressing Ctrl + G twice, but that also hides any pets you have.

The first image does say you only need to complete only one of those quests to gain access. So it looks like you have done one of them already? Also you seem to have the Dawn of Khanda Vihar weekly quest, so that would suggest you also meet the requirements to enter Skybreak Spire. Perhaps you somehow joined an alliance and you accidently got locked out this week without knowing it? (The dungeon resets weekly) If it's not that, then maybe you can seek help somewhere else.

That might explain why you're stuck with the progression in the story, because if you had equipped whatever the story gave you, you should have been fine. At level 47, you should have access to the moonwater soul shields. If you go to hogshead hamlet, there is a NPC (non-player character) near the wheel of fortune that should sell those soul shields for naryu coin. To equip the soul shield, just right click it. Also, if you press B, you can see the soul shield inventory. You can even equip an alternative soul shield for storage purposes (but it won't be active) just drag it into the slot.

I had to also rewatch a video to figure out what Dorin was, and I realised he has no colour indicators during his attack pattern. So instead, I will refer to his attack pattern visually. The frontal jab can be considered a "yellow" attack and you can press 2 to counter/block and go into stealth. The bombs you refer to can be considered a "red" attack and you can press Q, E or SS (at the right time) to completely negate the damage and also avoid getting knocked down. You can also use other skills which say "resist damage and status effects" - these are all called i-frames. Q, E and SS are the universal i-frames for most classes. You can also use the 4 skill (with the triangular aoe) to heal yourself up if needed. As with anything, this might take a bit of practice. Good luck! P.S. You're also vs-ing an assassin, so he has the same tricks in the book as you do. The bomb he casts is the same as your Z knockdown, which is also a bomb :P If you read what your Z does, it "pierces parry and defense skills". This means your "decoy" or your 2 skill won't work, and you need to use an i-frame as it is considered a "red" attack. This might make more sense when you vs other bosses with colour indicators. P.P.S. This was the video I relied on to see Dorin's rotation. Beware this person had very low fps, so it almost gave me a headache trying to watch it.

Unfortunately most of the story is solo content, so you will have to defeat him on your own. If I can build on what others have said already, you can knockdown on your Z skill (press it twice), stun while pressing LMB (left mouse button) while in stealth, and daze by pressing 2 and then F while facing the enemy. Your 2 skill is your block, which you want to time when you see a yellow attack coming your way. As others have mentioned, this also puts you into stealth. If you see a red attack coming your way (or a yellow attack, but more important for red attacks), if you press 2 twice, this gives you an invincibility frame, otherwise known as i-frame, which negates all damage done to you, provided you time it correctly. Pressing Q, E and SS (double S) at the right time also provides an i-frame. If all else fails, most mobs you can just circle around them (hold onto A or D while rotating with the mouse) to avoid most of their attacks.

I decided to open up all the old MSP boxes stages 4-6 that I got during the MSP event a few months ago. Here are the results: