What do you mean dodge buff for 30%? Do you level the "Dark Soul Barrier"?
I'm thinking about maxing SS, LB, WA, Dagger mastery and Soul Stab, I hope I will have TP left at 50/50 for Ghostly strike. Is that a good way to deal TP?
Yes, but ghostly strike is your set up skill, the weaking affect makes soul stab your most powerful attack.
In a boss fight, you would use your dex boost, and your party dodge buff, it lasts 30 seconds I believe. If you use the rotation I put up you will be massive dps, you can also add combo throw at the end up that, both energy and focus should be regened by then. Rogue as a whole is a very easy TP class, you can keep your wound attack a few levels lower if you need TP. But with the 2 extra skills r/wl is TP intensive.
But this unlike r/s is a very sustainable DPS class combo.