Welcome to Librarium Online!
Well here goes:
I've only played alitoc with this one but the immortals ripped appart the gaurdians with their ass.2 weps... ya he gets 2 more brutes but I just shoot and assult if I don't kill them while shooting.
Also can I assult a b squad that I didn't shoot at? Like if I broke down (atomicly) the one (entirely) that I shot at, aslong as I'm in range?
Unfortunately you cannot (unless the killteam rules are different) shoot at squad A and assault squad B.
Also does the phase rule apply to KT, cause that'd just seem too unfair, depending on what the brutes have for weapons.
And ya that does answer the first question thanks.