While I didn't encounter as many rogues as I was sure to make sure they had vanilla spawning behavior, I did feel like the mid to higher level PMCs generally had really high quality ammo and headgear, loot and medical injectors. To the point where it felt like looting anything except barter items was kind of pointless when I could just find some PMCs to farm. Every other PMC I killed was wearing a vulkan with a shield which vendors for insane amounts. In online tarkov, you never find medical injectors on PMCs because its in their secure, and people rarely run faceshields. tbh I have not even noticed the bots use the injectors so I'm not even sure why they spawn on them. I had to go through the loadouts and lower the weighting on a lot of better gear and remove some items from the loot pool. Although I was already rich from the spoils at that point so it didn't really matter.
Are you playing with hardcore flea, tiered flea, and randomized traders? With med changes? Are you using other mods that might be messing with bot loadouts? The mod is balanced around all the mechanics that have been added. It'd probably be pretty easy if those features were disabled. I'm not trying to make the bots or PMCs mimic real players, but instead make a single player experience, so it doesn't make sense to me to not give them items on the basis that it'd be in their containers. I tried to give them stims that aren't that great, like propitol is rare. Vulkans on Bear PMCs have a 1 in 37 chance or something like that, I don't see how that every other Bear could have one? In my testing I rarely seem them, like I've been spawning bots into Factory in horde mode without weapons to do armor testing and I've yet to see one.
Tbh the high player level rogues are kinda insane, by level 33 they're using almost entirely heavy THOR armor, airframes and up armored opscores, hk416s, SCAR-Hs and there's at least 12-15 of them spawning.
In general I kinda feel the loadouts could be toned down a bit for the high levels. Why not an optional alt loadout system where the bots (PMC specifically) only use specific barter preset guns and more bare bones headwear(less visors and extra armor), so to better encourage looting and leveling trader, so you can't just find insanely tricked out guns and uparmored helmets everywhere, while the rogues could use their base tarkov line up but progressively start using their better stuff like their SCARs and hk416s, and maybe just in general tone the raiders down more to russian surp gear and guns.
Rogues have a 1 in 23 chance of having Thor's, not sure how you're seeing them with lots of them, maybe I could make them even more rare but in my testing I'd rarely ever see one, I don't think I remember even seeing one. SCARs and 416s aren't any better than any other AR really. In terms of attachments, they get better with each tier, but noting crazy (and attachments aren't a big deal in Realism mod). In this mod all ARs will perform more-or-less the same generally, and a stock 416 with a scope won't be that disadvantaged vs. a fully modded 416.
It's really hard to balance a mod around feedback, because I've no idea if people are using the flea and trader options, med changes, what difficulty they have bots on, if they have other mods interfering with bot loadouts (has happened a lot), etc. and even then I get told the same things are too easy or too hard, too much or too little. Then there's a wide range of skill level too
Best I can do is try to get to high levels in a playthrough myself and look out to see if the bot loot is too good or not.