S
Sunseeker
Guest
One concern to be aware of. With bounded accuracy, numbers of attackers are more dangerous that attacker power (in general). So, despite the fact that your kobolds have 1 hp, they still do 1d4+2ish (5 points avg.) and hit pretty often (especially in packs with advantage). So they will still output a ton of damage, even though they drop in one hit (and they usually do normally, with 5hp anyway). So your minions are a viable threat to drop characters fast, sometimes before the characters can act to cut down their numbers.
I believe in 4th, minions could grant advantage to non-minion mobs, but not themselves gain it. If I am incorrect, well it's been a while, but since minions exist for purposes of simplifying large-mob encounters, giving minions advantage would be counter to that point. So simple rule: minions can't gain advantage.