Hello grauliuswhubreg,
hi, why don't you use some creatures? in t2 there're some nice vampire with madness, what do you think?
I've discarded (haha) the creature approach. It was my first approach to madness in fact. I have, in fact, a Modern creature Madness decklist on this page, but I have it on private because it doesn't work right. I've found it to be too inconsistent (and weak to removal), too slow and not interactive at all. Feels a lot like a weak glass cannon, which is not much. In Standard it can steal some games, in Modern it's just not good enough to do anything.
Thanks for your comment!