Derelicts
this mission's easier, & that's relative & opinionated! u're required to clear the radioactive debris so that the mutha-ship can hyperspace out of this map. u get to build movers this time to help as it's your only unit that can survive the radiation & destroy the debris.
tips: if u want the game to last long enough for u to harvest every little resource in the map, don't destroy the last piece of debris. u have total of 7 to destroy. save the one farthest from the big core for last. don't let any unit other than movers to get close to the radiation.
this time, u get to have both movers & vaygrs as your opponents. woohoo! not.
after hyperspace jump, rush to the nearest harvesting spot, big mutha-ship & all. all except your carrier & some frigates (2 flaks, 3 torps, maybe 1-2 ions) which should have opposite trajectory to your big-mutha's. why? there's another resource patch there & your carrier (which can produce frigates) have no prob beefing up its force along the slow journey. not much need for turrets in this mission but that's up to u. have some more resource collectors to harvest the patch at the carrier's destination.
a time-based script will trigger & tell u a vaygr probe is entering your space & u should kill it to prevent the enemy from detecting u. a squadron of scout/interceptor can do the simple job. anyway, just to let u know that it's futile & the enemy (which u know is the computer AI) already knows u are there, so ..... . oh well.
depending on your orientation on the game map, vaygr's shipyard is situated on left/right of u. & it should be not too far from your carrier. this is the part where your carrier makes its crucial move. move it together with its force towards the shipyard & blow it up. beware that vaygr produces destroyers. this can work to your advantage if u do have your marine frigates with the carrier. but make sure it's at the back of your attacking force as it's vaygr fav target. it'll be nicer if u have defense frigate(s) as well as it can protect the marine frigate from most enemy fire.
the big mutha will be constantly harassed by fighters & corvettes as well as ocassional heavy missile frigates(kill them with bombers). don't worry too much, so long as your defending force holds up & u keep replacing the losses.
on the same side of the map as vaygr shipyard is a carrier which manufactures fighters & corvettes. u know what 2 do with it. deal with it first before going for the shipyard.
when u start the mission, u should be able to build destroyers & max number is 5, which is a lot. have 3 to defend the big mutha & 2 for the carrier attacking force.
nearest to the big core(u'll know when u see it) is another vaygr carrier. dang, how come the vaygr can withstand the radiation? shielded, yeah right. this carrier should be your last target.
it's very straight forward; search & destroy. enemy AI is a tad dismal compared to previous maps, which is good as i'm not a sadistic starcraft gamer who likes whipping himself.
new ship: destroyer, mover(sucks for everything else)
new tech: upgrades for flak frigate, destroyer, firetower support for big mutha