Over the fate gets 10% crit dmg and scales the elenore 20% - 40% based on mob hp after epic rework. +2 to twin sword mastery as well, I believe. (it may have that atm, not sure) Personally when I got mine, i made the switch from a lib dagger to over the fate and it worked out pretty well. You just gotta be careful if you use something like oils to bring your hp down. As for dagger rogue, you probably want to go 6pc gracia, 3pc bulky. I don't like gracia myself because of all the procs making it a bit inconsistent, but you probably won't beat it without things like assasins top/bottom, tactical belt, ray decrease etc. Of course, you'd go force:hit end rather than gracia if you have The End.