If I do a Superhuman Run. I think I'd get rekted pretty hard plus this is a Hardmode mod. Is it really THAT Hard? Cause I really don't want to start my first lp and get stomped by immediately.
Well i balanced it for Superhuman Difficulty. But start with whatever difficulty you see fit, difficulty can be changed in the savegame files anyway. The main difference will be that aliens do have lower stats and lower armor and lower numbers.
For example a alien base has a maxspawn of 46 aliens on superhuman, 60x60x2 map and up to 15 of the enemies spawning can be terrorunits.
And you can have mixes of terrorunits and aliens.
If you do not wanna play on Superhumna thats also fine, you can increase difficulty later always, be changinng it in the savegame files.
You will see, you could give it a try
(Iam waiting for when you encounter the first new Terror Units, like Muton Berserker and Armored Cyberdiscs).
EDIT: You can see how fights are, just open up a Terrormission in "New Battle" vs a Skyranger crew. Example Mutons, medium game time equipment vs X-Com Personal Armor + Lasers or so.
EDIT2: There is a big number of equipment available, Sniper Rilfes, Shotguns, Grende Launchers etc.. they are all balanced and the aliens also do have them.