Why rig the free wheel? 4 servers = 4 rolls a day, 3 weeks = 63 rolls, 16 items, no way in hell can I not get more than 3 green items just by "chance". It's so painfully obviously rigged, if you're going to put items on a "free" wheel, just put all green/white since I've yet to see anyone get an item better off of it.
Lame, 1 star, it really really, and I mean REALLY sucks. I get hit by 50+ ballista on a single wave on day 19 on casual mode without hard waves, that's total B-S.