I've been playing with this a LOT on my module, because I am exactly in your situation - I wanted 75% volume w/ a normal hit - so, a little room for the really hard hits. I seriously sat down and tweaked the snare for like 20-30 minutes.
I will discuss what I tweaked
Threshold: I find that a low threshold tends to lead to 'easy max'. Meaning, low threshold means you'll get 100% easier, boost this a bit to dial down the hit strength of your strikes.
Sensitivity - this is key; watch when you strike the pad you will see the strike strength on the top in a row of bars - the harder you hit, the further to thr right the bars go. You MUST figure out what a 'regular playing snare hit' level is. Tweak the sensitivity so that the bars go 3/4 (my case) of the way across if you are playing a standard beat. I'd turn on note chase - hit the snare - then turn off note chase so that you can play normally, but only the snare is on the screen for editing - keeping note chase on you'll watch the hits bounce around from hihats to bass to snare, etc. BTW, my snare hd sensitivity is at 99, and I have to REALLY pound my snare to max it out.
Curve - once you have the sensitivity dialed in (after 10 or more minutes of playing / tweaking) go play with curves. I tend to like the exp curves for the snare, although, this is something you should play with..