[quote=@VATROU]
[@Dedonus] Well Fortuna probably won't have a lot of direct contact. If I remember right Fortuna is fickle and I'm not sure if that applies to Tyche. Either way I'm fine were her being the same entity. It doesn't change a while lot. I'm kinda bummed that she falls under your jurisdiction of sorts. Since I wanted to avoid using the Greek Gods. But I can live with that. 
[/quote]

Yes, that also applies to Tyche.  While she does have an aspect that dispenses "Good Luck", luck goes almost as soon as it arrives.  Nemesis, as Fallen has already mentioned, is sort of an equalizer.  She makes sure people don't become too lucky, or people who don't deserve it.