Both are really good on Poe. Maybe it depends on your play style (lot of koiograns or not), but what is more preferable?
Pattern analyzer:
After koiogran (or debris field) you still are able to take Poe´s live-saving focus token
Sensor cluster:
Possbile double evade with Poe´s ability after focus/blank roll
I have never played Poe (or any other T-70), how often do you koiogran? I think in a defender meta it is more than often?
I prefer R2-D2 over R5-P9, which is more suitable for both tech upgrades (green maneuver for Pattern analyzer or no focus token left when spent with Sensor Cluster)
Thx