EX Set 11 is rather well done, I've seen all the units see play so far. If I were you, I'd go for 2x gowen though. It's not that the refess units are bad, but it's just that EX fighter pixy is arguably the best unit out of the 4 (refess and gowen). As it stands, EX fighter pixy already has a strong open skill, but I feel it's only going to get better as more and more units with the focused ability are released. We're probably much more likely to get more focused units than carbuncles or morning units. Even as a relatively new ability type there are already more units with the focused ability than morning capabilities. I'd bet out of all the EX 11 units Fighter pixy's going to see the most play (it actually already seems like that now, actually).