Here is my Guild BO for 15K game.

This BO gives you a guild palace and NAIBS with only 2 refineries and still enough for defense vs. rushers!

1.  Deploy MCV, Make Bar, +20 Infantry, then Refinery.

2.  Always upgrade your refs.  

3.  Make a factory then 5 first level vehicles (either dustscouts, sandbikes, or buzzsaws), then a harvester (this is very important!)

4.  Make a second refinery.  Continue to upgrade refineries.

5.  Now after you make a harvester, tally up 10 more first level vehicles if a rush threat is still present OR start making more powerful vehicles.  The important thing is that you keep making vehicles but DONT RUSH.  You should not do a thing until you have guild, which you will have very shortly!!  

Important:  If you are playing against Atreides with a drone threat, after you make 20 infantry dump out troopers around your refineries and spice.  If you are Atreides and dont have troopers, then right after you make your harvester, dump out a couple mongoose, then continue with either more sandbikes or more mongoose.

6.  No factory upgrades!! (this is why Atreides for this is not recommended.  Hark is the best house, IMHO, for this BO).  Make 10 more infantry/troopers.  Once you place your second ref, make another windtrap and now make a guild palace.  KEEP UPGRADING REFINERIES (You will NOT run out of money!)

7.  Place guild palace, make one more trap and upgrade guild palace and queue up DOZENS OF GUILD TANKS!

8.  Make a THIRD refinery.  You will have a guild tank before your third ref is placed.  And you will still have over 3k and you have been making a CONSTANT stream of buzzsaws (or bikes or scouts).  You will have 15 buzz, 25 infantry & troopers- so you will be rush proof AND you will already have your first NAIB, and you wont even be close to zero Solaris.  Now, wait until you get 2 guild tanks and GO KICK SOME BOOTY!

-Emprworm