I'm off to colonize a tidally locked planet around a brown dwarf. Air convection ensures the entirety of the planet is habitable, except for maybe the Hot and the Cold Poles where temperatures are too high or low for life to exist.
Let's assume it's a shallow-ocean planet. Large bodies of water exist, but the planet is dominated by landmass. Groundwaters are therefore scarce, and about 65% of the planet is desert, not lifeless but perhaps a bit too dry for most lifeforms. Localized lush gardens exist, primarily concentrated around the water bodies. The "hot" pole is constantly blasted with the brown dwarf's output, therefore temperatures average at ~140 degrees there (or 60 Celsius) while the highs reach a whopping 169 degrees or 76℃. Non-monster habitation is hard there, though hellhounds, balrogs and fire elementals feel just at home. The "cold" pole is practically frozen, with only an occasional wind bringing temperatures above ice melting. The place is home to nothing but snow monsters and ice elementals. The comfort zone (w/ temperatures averaging at ~77F/25C) is slightly into the night side, the temperatures at the twilight zone are around 96 degrees/~35.5℃.
Life is possible at the night side despite the lack of light. The plants have adapted (and some have been bio-engineered to use alternatives to photosynthesis to thrive) to the lack of light. The whole planet is rather dim, where even the hot pole doesn't reach even a third of the brightness of a typical sunny day on Earth, and is basked in a brick-red light; the sky changes from bright-orange at the day side, to the crimson red at the terminator zone, to pitch black in the dark zone. The planet also has two moons, both looking red in the night sky.
Whatever arcane energy on the planet is more vibrant, proliferant and aggressive than on Earth or the "Demon World". Whatever monsters migrate there will become more aggressive,
more feral, and much stronger, though for most of them it would come at the cost of reduced self-control. Even the turtles from MGE will start showing an assertive streak, while your average kitty or fox-girl will turn into a violent barbarian. You probably don't want to meet an ogre or a hellhound there. Dragons, however, hold up alright, showing only a minimal increase in aggression.
And, of course, the gender balance is hard-locked to 1 man to between 3 an 10 thousand women. While back home, it didn't result in a rape-topia since monster-girls mostly take a rational approach to choosing their lifelong sexual partner, in here, it halfway does. Some monster-girls will fight each other to be the first to bang the guy, which might give him some time to escape or take his pick, others will cooperate, resulting in a hot, steamy gang-rape if they succeed. The environment is also naturally resistant to the "mere this, correct that" maledom BS, so any moron trying to find a Neat Trick to beat a powerful monster-girl will be either thrown out of the world (the most likely scenario) or it backfires horribly and the poor dumbass gets raped by a much, much stronger monster girl. Also non-female belligerents and would-be conquerors just die on-spot and resurrect in Bully Hell where everyone is far stronger than them and no girls would ever choose them. They end up having their souls eaten by their betters, who remark how delicious they are when they're weak, helpless, and eating their souls until they expire is not unethical because they chose the "might makes right" approach while they were alive.
So I'm about to arrive on the planet. I've got only a self-defence-grade arsenal - a marksman rifle, a shock pistol, a hunting rayleen and a fairly heavy plasma cannon. All weapons are self-recharging, but in some cases it takes time and I'll have to wait until I can shoot again. The marksman rifle is precise and practically has unlimited range, but its charges are somewhat weak; it takes two of them to knock out a regular catgirl. The shock pistol is lightweight and compact but, its range is short and it can only temporarily (the timeframe of a few seconds as opposed to minutes or hours as with the rest of the weapons) stun the target. The hunting rayleen is a select-kill weapon, it can kill bigger animals and knock down most monsters (with exceptions being dragons, hellhounds and the likes) but, as a hunting weapon, it has a very slow reload rate and holds only one shot's worth of energy. The plasma cannon is a powerful gun that acts both as a powerful flamethrower with the range of ~250ft, burning with several thousand Kelvin, and as a plasma ball launcher; the balls of plasma travel at roughly half the speed of sound and produce a MASSIVE explosion; even a dragon would be staggered by it. It can fire about six plasma balls before recharging, or about three minutes' worth of hellfire, but the recharge times are humongous (about 8-12 hrs.) and... well, it's a heavy weapon, and as such my scrawny ass can't handle it well, resulting in terrible accuracy and efficiency - and, maybe, even the chance of accidental splash damage, where I would end up knocking myself out of action for hours. (Obviously, none of the weapons are lethal for any sapients except the undesirable aggressive males.)
What landing zone would be the best? The general consensus is, the further it is from the comfort zone, the less monster-girl threats I'll face, but also there'll be less opportunity for survival and development. What weapons should I carry on my first expedition, while I don't know what might lurk in the darkness? I can only bring two if I want to be able to move comfortably and do my tasks (if I choose the plasma cannon, I won't be able to carry any other gun except for maybe the shock pistol, damn this thing is HEAVY ). If I encounter a monster-girl, should I fight, run, or try to reason with her?