Here is some of my experience.
Use a ship which has the point defense on top. I used the cobra III which has the point defense only on the bottom, which did not help. The second time I used an ASP X.
Make sure that you park your ship not to close to one of the pylons. It happened to me and I could not get into the turret to shoot at the pylon (activate it) because the ship was to close. I could not shoot at the pylon from the SRV either because the gun was to low. In the end I had to dismiss my ship. Then I was able to activate the pylon. But now I could not recall my ship to help with the point defense. For that I would have to have a distance of 500m or so (I don't recall the correct distance) from the structure.
When I did this the first time and a sentinel attacked me, mostly from behind, I desperately tried to turn my SRV around and engage. Later when a Sentinel attacked me I activated the hand break, went into the turret, turned towards it and engaged. I found out that when I activated the hand break the turnover bolts can not flip me over so easily. Actually I don't remember if they ever did. PIP management is important too. 4-0-2 being attacked and 2-0-4 attacking.
Fly/land safe.
CMDR Steyla