First of all, it's a concept and I think it would be better to understand when you try it. It's hard to actually make it look like a raid when we're only 2 people.
Like it seem you actually think you just go around and kill mobs and bosses, although it's more than that. While the bosses uses unique skills, you have to actually work together as a team, it's impossible to do it like we did. You need to be like 5-10 players at least.
Also you have to do certain tasks before each boss, but haven't got around that yet, as of now you just need to kill specific amount of mobs before each boss appears and once a boss appear you have to defeat it before your kill-counter continues, meaning you can't just skip bosses.
The first boss can only freeze the surrounding players.
The second boss is actually 2 in 1, where the one of them can freeze the players and the 2nd can make snowballs (luls) fall down on the surrounding players dealing damage.
However the whole key lies in the last boss as that is where the most team work is required.
It can do all the skills the others do, however it can also spawn other creatures, that you have to kill. If you don't then you can't hit. It will protect the creatures, so it can be hard to deal with them using physical attacks. Again team work would be the best way to be it.
It has an area skills where safe spots shows up for 5 seconds and you have to get into those spots and if you aren't then you'll be hit with pretty hard damage, so not only do you have to focus on dealing damage to the boss, but you also have to focus on staying safe. While it can still go and attack you.
Like I said it's hard to show the concept with 2 people.
And @ that there is a lot of screen shake, it's due to me cutting out certain parts to show that. In the raw video there isn't that much. It's only at the bosses when using certain skills, but again it's a concept, not how it may actually be.
I apologize if it all seemed rubbish and that you misunderstood the concept, will try to do a proper re-record later when there is more people to do it with.
Thanks for the pov's though.