Sap is nerfed period, (Shield Inversion is a useless skill do not use it).
3 months ago, I am old and retired so I maybe off on time, but I could sit with my PP grouped to my PW, send the PP out and start shooting a 58 volti and backup bringing the 58 to the PW (PW Summons). Once the 58 was in range the PW would start shooting and I would regroup the PP back with the PW with both shooting, guns a blazen. Together they had no problem taking out the 58. Sometimes the PP would go out and bring back 2-58 volti and a 60 volti, not intended, guess what, the PP and PW could take them out, but at some point in the heat of battle I would have to break off shooting with the PP and focus on recharge the PW shields, but never did it get into the PW hull, shield sap was working then, if the PW shields got down to half gone I would hit the top lvl shield sap and it would fill his shields.
The last time I logged a week or so ago, I went to Antares to try the 58-60s again, PW lvl 146 maxed on what matters, PP lvl 150 maxed, pulled up close to the nav ah.. a 58 volti all by himself, slammed on the brakes and commenced firing, hmm, I am losing shields fast on the PW, hit shield sap, huh, I get a tiny bit added to the shields, another 58 shows up guns a blazing, shields on the PW going fast now, I had break off firing with my PP to just concentrate on keeping the PW shields filled, but now the second 58 is firing at the PW, I can not click the Max recharge button fast enough with the PP, they started going into the PW hull, WHAT THE, finally one 58 dies and I was able to get half the PW shields back before the second 58 died. I tried sapping twice more during that battle and just gave up, it is useless the way it is now.
I have 2 lvl 50 JDs do not like playing them, sorry but boring, I also do not like throwing misses at things, again boring. Waiting the extra time to use sap was hard to get use to, but I slowly was able to change my game play to adapt, key word here is “slowly”, did I mention I am old and retired and slow to react to things, that is why I like/liked the PW it is/was fun and it gave me a little room for errors, ya know to be able to lean forward and look at the screen, oh there is that button I need to click, hurry up you old fart shields are going fast, sap em. I always carried around the PP for insurance just in case I was to slow to Sap at the right moment, the PP was the loot picker seeing that all the hulks end up 3.50+K away from the PW, plus if I messed up on Sap timing the PP could charge him up quick and continue looting. WAS a good team, now all the PP is what shield Sap use to be. Yes Sap is useless right now.