[quote=@Willy Vereb]
<Snipped quote by ClocktowerEchos>It's less of Mothership Zeta and of course more of War of the Worlds. Think of my steampunk RP faction with a bit less zeerusty tech. If anything I see them inferior to my Enclave in power. Basically they are stuck on Earth.


[/quote]

WotW aliens have the solar-insta-vaporization-laser gun.
My question is how would they be inferior if they're from space? They clearly would have FTL or some other method of space travel. They would have weaponry and technology not affected by the fallout or any post-apoc things. Lasers, computers, engines, etc.; they would have a huge advantage over everyone else as everyone else is basically jury-rigging old stuff or trying to forge new stuff. Even the bunker people would have a disadvantage since they'd be stuck with whatever they got when put into the vault which would certainly be less advanced than what aliens could bring.
You said yourself that they were "planing for major conquest" and you already have nuclear capabilities, you don't need to add even more things that could give you an even greater advantage than what you already have.