Guild Wars 2

I have the same issue, i have completed the Pact Commander mastery after farming Curshed Shore since i was able to get into HoT to unlock the mastery.
I farmed for like 9-10 hours straight to complete it and the moment i wanted to try it out it kept crashing my game every time it looted something.

So basically as a guardian you are kinda forced to do CoF with a normal mixed class group.
Thank god i’m leveling a warrior then so that i can have a taste of that farming

What is up with these groups forming for CoF farming that they only want 5 zerker warriors in the group.
Is there a specific reason for this ?
I know if you take 5 warriors you can practically keep 25 stacks of might up if done right but wouldn’t that increase the chance of dying ?

If someone can give me more info on this that would be great