Triffid queens are easy though. All you need is a decent gun that isn't a pistol and they'll be dead with little effort. Melee may be more challenging though.
I'll be honest, the only time I fought one of those was when I was robust enough to farm the
Amigara Fault in melee with basically no damage taken. I guess I thought they'd be harder with a less ridiculous character.
I'm also philosophically opposed to ranged weapons in games like these, so I don't use guns. Closest I come is using the Railgun CBM to fire my metal melee weapon and then using the Electromagnet CBM to get it back to me afterwards.
I guess it's my character set-up; I'm based mainly around dodging so any enemy that combines high-speed and hard hits is a death sentence.
oOOOH, those builds can be quite fun! I've done a couple challenge runs as a dandy[Stylish trait & only wearing the fanciest clothes] and, in my experience, you need a fast and highish damage weapon to stunlock people so they can't hit you as much. Martial Arts works fine[I used Ninjitsu, eventually with retractable claws], as does something like a combat knife, rapier or even a bullwhip. Having block or parry on your weapon helps oodles too. Even then, Dodging builds are all fun and games until the bullets and explosives start flying, FYI. Unless you have whatever CBM let's you Matrix Dodge things, you're gonna need good armour if you plan to get into a lot of the later game areas. I remember it being a pain to deal with turrets in labs when one volley could bring me an inch from death[Fancy suits do not protect against fast-traveling projectiles, even if DO they turn my : | into a :3].
Still, they're still too aggressive to fulfill their purpose on the surface: to guard high-value corpses. There really should be a critter that's more territorial in their place.
Your sight range IS outside of the Mi-Gos' aggro range, so you can technically just go around them once you spot them. In practice, if they're near somewhere I travel to or from often, I end up accidentally cutting across their tile and drawing their ire eventually. I can't remember if there's some way to designate an area as "restricted", like there is in Crawl. If there is, try placing that about a map tile and a half around them to avoid wandering too close.