This event seems, for me anyway, to be a no lose event. I ttok a note of most of my resources prior to starting the event and all of them are better than they were by a long way in most cases and virtually neutral on ironite used - I have farmed madness of course and also done other stuff like daily dungeons/quests etc so that will have helped but so far I am almost ironite neutral after collecting 6161 frags, gaining around 4.5M gold, 220 SoW and various other stuff on top of that from the loot you get.
Defo a win, win this one even if I wil be down a little on ironite, it wont be much - maybe a hundred or so.