In the case of option 1, the high gain of the 3906 is exactly what kills power efficiency
I also did the following:.......
BTW, these designs in no way really need a JFET, but I found it fun to keep it in
With the low photo currents the mirror should have a collector voltage no less than 1V under 5V and only mildly variable, which gives you higher bias stability
I really don't think the R and C extra are a good idea, but it's getting late again
So I thought I'd just upload it and let someone else choose
If with some coupling setup there you can reject static currents, you only amplify and transimpede dynamic current signals