You could utilize the other 3 op-amps in the TL074 package to increase the gain in stages, to get a better dynamic range,reduced noise & enough signal to drive an power amp IMHO.since a gain of more than 8 in the buffer /1st stage will make the circuit unstable & render it prone to both feedback & excessive noise.
Importantly,both Back-electret & condenser mics have considerably high impedance,hence these must be run on a non inverting buffer pre-amp. On the other hand,dynamic mics have relatively low impedance under 1000ohm & therefore can be easily driven by pre-amps with inverting input buffers.
The only snag is that, in order to drive electret & condenser mics,these require a DC (bias) voltage anything between 2v to 48v DC! This not at all difficult & can be tapped from the battery or the power supply to the circuit with a few components.