I read on the forums that you can resurrect friends in multiplayer? I was not involved in the beta, but if you can indeed do this it is news to me. Resurrection involves channeling time as well it seems.
How does one do this in game? Is there an icon/hotkey for it? Can it be done during boss fights?
If I remember correctly from beta, you just click their body and the timer bar pops up until you've resurrected them. I can't say for sure but it feels like it's a 8-10 second channeling and if you get hit by a monster, you're interrupted.
Yeah, when some other player dies, they leave a cross/grave behind and you can click it (which will bring a casting bar, much like the Town Portal one, which gets interrupted by damage/hits) and the player is back alive. I dont think it's as big as 10s, but it should be around 5s if I'm not wrong.