Sensory deprecation is a very specific skill. I'm not sure how much staying power it could have before it is just the same scene over and over again.
Yeah, I kind of tried to think of how to smartly use it, took me a minute or two to finally give up.
For example, not wanting others to hear or see you? Turning them blind and deaf is not a way to go.
Pain negation on oneself? If on the field and can localized, maybe, but losing the feeling of pain might cause one to overexert.
Losing a sense to improve on another? That shit is not instantaneous, so moot for fieldwork.
The only thing I can think of is when MC wants to fart and thus he remove the sense of smell of those around. Shit goes out if it is not a silent fart.