I found that on those low levels int isn't necessarily the best thing - for instance my damage meter showed me much more dps with a 2-5 dmg item then with a +11 int one.That's the thing. I have a shield that gives me 36 int. I'm thinking for now, shields are the way to go. The actual off hands for wizards probably need some tweaking with bigger numbers to match.
1 point of Int gets you only 1% more dmg (iirc) so it's not much when you have a 20 dps weapon.
Everyone starts at the same quest as the host, everyone will get the same quests at the same time etc. Talking cutscenes are for everyone, but the character talking is either 1) the one that started the conversation or in some ocasions 2) the one closest to the npc. Everyone can skip dialogues, so don't play with assholes.Could someone please explain in detail how quest- and story-related stuff works when playing co-op? Like, does the host of the game control how the story progresses and when new quests are started, or are all players "equal"? When talking to a quest NPC, will all players see that dialogue, or just the host? And what about the cutscenes that happen at certain points? Etc, etc.

Cinematics are for you only (i don't know if you even can be kicked out of them).