C3 & C4 at 1nF each, together with R12 of 1K are the two pole compensation scheme. The effective dominant pole miller cap value would be the series value of these two, so 500pF.

This gives enough stability for a closed loop gain down to about 10dB.

If you wanted/needed a closed loop gain that was somewhat higher, then you could lower the values of the caps. As a practical example, I used values of 470pF each (235pF series value) for a closed loop gain of approx 24dB and the circuit was quite stable.

An easy rule of thumb I use for checking stability is a margin of 12dB, so if you can lower the gain by 12dB less than you want without instability or seeing anything strange happening on your 'scope, you're OK. It's worked for me anyway.

Of course, you could just leave things as they are regardless of the gain you want, but there are benefits in terms of having more feedback at higher frequencies when using the lowest practical values there.