"Most tips you posted are ridychulous, because or they require a lot of time to build, a lot of money, or a great coordiantion. Victory is really mutch simpler.
Ally with IX house and build 3 Ixian Projector. Then just clone any unit you want, no matter if is gunner or missile (saw that the best are the sardaukars but doesnt cares). Just begin cloning. S etarallypointinthemiddleofenemybase.
Keep on cloning with the 3 projectors, each time you have 9 clones if its a tank or 18 if its an infantry unit the one who was clonated, send then to the rally point. They will head to enemy base killing EVERITHING. By this way you can win any stage in 5 minutes or less (took me 3 minutes to complete last one...)" - Kangaxx

"On the final Harkonnen mission, the easiest way to win is this: build up your base until you can get advanced carryalls. Buy three advanced carryalls. You start the mission with three, rank three devestators. load the carryalls with these and place them on the far side of the emporer worm. They will survive the trip. have the three devestators attack the worm. they will kill the worm before the enemy has a good chance to retaliate" - Devestator4evr

"1. about the emperor worm mission. playing for the atreides.
mega cannon : didn`t ANYONE notice that the mega cannon DOESN`T shoot the air?
just take a bunch of ornithopters to wipe it out!
2. there are many tactics to win a seriously defensed enemy base.
but the best way is to combine them. for example the enemy has missile turrets spread al over his base, mino`s, mongooses, etc.

what you need(Atreides):
1. 5 infiltrators (5 more afterwards)
2. 3 apc`s with 3 engineers loaded, 1 for each
3. about 20 ornithopters (the more, the better :-)
send infiltrators close to enemy base smaller entrance (if there isn`t one, the main should do the trick) send apc`s there, too. (DO NOT load them with anything except the engineers, the`ll get killed before deploying them.) inch the infiltrators as deep as you can, avoiding detection(do not move them in a bunch : separately, to different buildings), then deploy them at the SAME time (just choose one, press "T"(chooses all of them in the screen), then"D"(deploys) ).
after the deployage, the units will be almost confused, and the`re `ll be much space :-). inch the apc`s to the main buildings(use their invisibility), deploy the endineers, and capture everything you can.
if there`s STILL something left (playing on HARD level) finish it with ornithopters. concentrate their forces on one unit.

this works ALWAYS, even after waiting an HOUR without offense.

for ordos: produce 5 Eye In The Sky every 10 minutes or so(i hope you don`t have trouble building 2 ).
also you`ll need about 7 laser tanks and 4 dust scouts.
bury the scouts in the dust bowl (just walk with them upo it and wait) close to the enemy base.
1 attack with EITS(5 at once, more will be hard to control fast):
move the EITS (using the force move)over the power plants(forgot the real name), 1; 2 over the refinery or the construction yard (which is closer), 2, the factory (1), and the hangar (1).
2. the laser tanks : make them shoot once each an enemy unit (wich is most far from the enemy base), run back. heal the shields, repeat attack.
every time you should kill one unit, without loosing yours.
after some time you`ll have 7 triple chevroned laser tanks and quite a little of enemy units. then, their range is close to the cobra`s, and tey should destroy turrets with one shot, not getting seen.
NICE!

what i said requires constant attention, but, using them, you won`t need the defence : the enemy just won`t have time for attacks." - someone