Bitwig limiter on drum sounds / drum bus

Hiya! I'm writing this because i'm mixing a new track and trying to avoid unwanted peaks (mostly on transients) that could be bothersome when it comes to mastering. For now i'm gently using Polarity's hard clipper device on kicks and snares (thanks mate!) in order to keep them in check, but still have some questions about the convenience of putting a limiter after compression in the drum bus.

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The main point is this: my partner and me tend to mix at low volume (we use a VU meter as reference, so our peak would be -18 Db LUFS). Should we set the bus limiter to -18 so it drastically cuts everything above that level? Would it be better to set it slightly above that level (-16 for example) in order not to squash everything and avoid artifacts? Or just play with the limiter's input gain so it reacts to the loudest parts and then reduce the output?

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I guess there will be an obvious answer to all of this, but i'm still a Big noob when it comes to mixing inside the box, so all advice will be welcome :)