From what I recall, the limiter is not compatible with the 100dB+ SNR feature; so you're probably better off setting a lower level anyways and leaving the limiter off.
With the 100dB+ SNR, you can bump the levels in post with less noise, whereas the limiter may engage in a way which is noticeable with a volume jump.
In other words, it seemed to me that the limiter is implemented using the 100dB SNR feature internally; but using 12dB or so of that as a buffer zone for the limiter.
For reference, I used level 3 with Mic ATT at -20 doing PiP via mic-out
with DPA 4061s. No battery box, attenuators, or anything in between; just stereo DPA4061s directly into the D100. Anyways I returned the D100 since it
did not seem to be worth the bulk + weight over my M10 + BB combo (using a lightweight rechargeable 8.4V Li-ion for the BB).