Hmm.. are smoke grenades really any good? I find very few situations where they actually help. Most of the time, if you're doing it right, you shouldn't be giving aliens any hope of firing back at you. There might be one or two situations where you get overwhelmed, but it should be extremely rare.
And it seems like an extra bit of firepower would help more than a smoke grenade (dead alien can't shoot back). Since Support often has high Aim, it seems better to have them shoot back.
I see it being useful if maybe someone got caught in half-cover, or if you want to discourage the aliens from shooting at the guy who's retreating with just 1 HP. But that's about it.
I don't get the Archangel + Sniper combo. I thought it wrote somewhere in the help page that flying doesn't give a height bonus?
Are you sure? And why not? It does give you a defence bonus though, right?
Using it in combination with squadsight to nail enemies is the best use for it anyways.
Something about the flying status doesn't grant height bonus. But then again, I swear that those floaters are getting height bonus on my guys. And I thought another disadvantage of flying snipers was that they lose the "half cover treated as full cover" perk. Something like ghost armor gives them the same kind of defense bonus too.
But yeah, I suppose that it's still safer than shifting them about the map, since I've lost a couple of snipers while jumping up on an alien infested roof.