A friend and I are fighting against Cthulhu since last month, and still we're not able to kill him!
We're both using the tron-like mage, and always trying to cast lightings against the water (saw a youtube video explaining it) to max out the damage to the boss, but it doesn't seem to affect him that much. We're out of ideas, we tried everything we could but eventually we end up dying with the boss at 50% health after a 30 minute long fight with minor but continuous damage to him... and this doesn't feel like the right way to do it!
We wanted to try everything we could before asking, but now it's become annoying (well, it became after 1 week of useless tryouts) so we have to ask for help to all the magickans outside! Any help/advice?