Shield Booster/Amplifier/Hardener, Pyfa

What affects the EHP/s recharge rate in Pyfa?

I was assumin it would be the Shield Booster with maybe an Amplifier, but when I switched a Hardener for an Amplifier I noticed a net loss in EHP/s because the hardener does not only give resists but also increases EHP/s?

Also, where can I find the Pyfa number in the actual ship window? When I hover over my shield booster it gives me a much lower number than what is written in Pyfa.

I am also not sure the in game number changed when I put in mid-grade crystals, maybe it did though. It still only tells me 300something while in Pyfa it is close to 600.