Fair enough let's ask the GM before going further.
@Dr. Snark do ordinary Abyss Walkers use the Dark Side regularly either during their duties or training?
That's a bit more complicated than you think it is.
Let me explain: Walker training doesn't require a trainee to
use the Dark Side, but it
does invariably require them to spend a lot of time in the Home - a confirmed Force Nexus that
specifically is connected to the Dark Side. The purpose of that is two-fold: first, to help acclimate a trainee to more extreme Force "pressures" so that they aren't blindsided if they end up in another Nexus, and second to help them understand what the Dark
is. It is intoxicating and empowering. It is corrupting and addicting. For a Walker to come out of their training complete they
have to understand that the Dark Side of the Force is
incredibly dangerous even when used "properly" and that the consequences of losing oneself to it are horrific.
Now as for whether Walkers use the Dark Side regularly that's legitimately a case-by-case basis and highly dependent on their personality. One the one extreme you have Riphath, who is quite literally a Jedi now and wouldn't really use the Dark Side for any reason.
The other end is Kygeetu san Torgh.
"Now hold on, isn't Dani the one who actively struggles with the addictive nature of the Dark Side at times?" That is true. But she's got a support network and enough willpower to pull herself back from the brink, and more importantly she's fully aware of the consequences (at least that's how I see it from where I stand).
Kygeetu is probably
the Abysswalker who would Fall almost
immediately given the right situation. Her morality is 100% based on what Ciaran wants her to do, she's far more prone to all of those negative emotions the Dark Side feeds on, and so on. The main reason she hasn't is because she's literally
that much of a fanatic and didn't do so because Ciaran (indirectly) told her she couldn't do that.
Don't get me wrong; her fangirlism is hilarious and she's a great source of comedy in Panory's omakes. But at the same time, that level of fanaticism generally means that bad things could easily happen.
Edit: It's basically like this:
"Average" Abysswalker: Falling to the Dark Side is bad because it could turn you into a mockery of your former self and completely destroy you.
Kygeetu: Falling to the Dark Side is bad because Lady Ciaran said so!