Right now, with my limited (and it really is) experience with Sap3-Fal3. I definitely would keep Broom Trap (max) and Claymore (max). Spike Shooter can kill you (literally), for some reason it does collateral damage when you’re too near. I think I got all the attributes for [Firepower].
Lv1 Punji Stake + Attribute to be uninterrupted, to bide your time and or stay put (can’t get KD’d).
Later on I’ll put in Ellaganos Cards to make up some DEX.
QS3 is only good for farming if already overgeared. Right now it suffers from the lack of crit