So, am a bit torn between PFF and Regen, what would people here suggest?

Latest Test Server patch notes says that Regen will rely more on Recovery to be effective, while PFF relies on Endurance and Ego. The same patch also makes Id Blades from TK scale with Ego instead of Endurance. So I'd say that for an Ego Blade build PFF would probably work better since it would work better with the stats.

But at the end of the day, playstyle and personal preference tends to win out over optimal stats, for me at least.

Another thing to consider is that regen (based on recovery) decreases in effectiveness when you're attacking and increases when you're being attacked, so when you need health you should sit there and block for a while (which makes it a good power to mix with ebon void because it gains strength the longer use it, imo). pff shuts off when it's absorbed all the damage it can (based on endurance) and regenerates over time (with ego), so it's more front loaded defense.
So it's kind of a matter of how you like to play.

Are there any other defensive buff one could consider? Regen seems to be best in my opinion, but since i dont stack recovery am not sure how good/bad it will be..

lvl 14 atm, and am still very unsure on what defensive buff i should choose, so i was hoping for some guidance here, could anyone help out? =)