UngeheuerLich
Legend
Ok. That is a function of how crits work.Oh not trained archers....guys with +0 dex, +0 attack. No training in the shortbow, just enough to fire the thing. 500 schlubs with barebones equipment take out an Immortal titan from like the dawn of creation.
I get that 5e intentionally made it where high end threats were much more vulnerable to masses of guys than older editions, so part of that is just setting your expectations in line with the system. that's why I'm wouldn't asking for like invulnerability to regular weapons or anything like that. Just a little regeneration so that the guy can strategically retreat from the army and then hit another spot at full strength....rather than have to go "well guess I just have to leave this plane those little arrows are real scary".
The easiest solution is to just removing the ability to crit from random unproficient mobs. Or general mobs.
Actually mob rules don't call out crits. So RAW there is no line in the mob rules that has 21 or higher as target number.
So going by that none of the archers do damage at all.
If you say a 20 always hits, if you have 2 packs of 10, 2 are hitting by the rules... Which equals a crit.
I think the spirit of the rules is just say: if they don't have a +2 to hit and no disadvantage, no hits.