500 point tournament sometime in September

So my buddies and I are getting ready for a partner tournament at Adventure's Underground (local used book and hobby shop) and I got to test out my IG version 1.0 on Saturday August 22nd. While we did not get completely run off the table (my IG did, but my son's Space Marines did not) we lost fairly badly. I think that was in part to my army makeup. The tournament calls for at a minimum of 1 HG and 1 Troop choice and your army can only have 1 Fast Attack, 1 Heavy Support and 1 Elite and for my 500 points I had:

1 Techpriest
1 Infantry Platoon made up of
-Platoon Command Squad (with Vox-Caster)
-2 Infantry Squads blobbed up (with one Vox-Caster)
2 Leman Russ tanks in a squadron

My idea at first was to have the tanks on the bottom corner of the board as to be able to give my guardsman cover saves, but decided against it when I got to thinking about falling back and did not want my blob of guard to be run off the table. Unfortunately for me, my opponent got his stinging scorpions in on the second turn and promptly destroyed my tanks because they were a squadron... count my lesson learned.... Dont leave figures on the side of the board where they can be gotten by outflank... It was fairly academic after that as the majority of my points were tied up in the Leman Russes, so I think I am going to mix it up next time when I use my Valkyrie instead of 2 Russes. Even though I got swept out, my son did a great job holding off both armies even though we did not win. His Space Marine Captain got some lucky rolls and was able to hold off the stinging scorpions and his Space Marines were able to hold off (even though they eventually died the last turn) so that he did not get swept off. All in all I call it a win for my son even though we lost.

Things learned for next time: Only use one Russ and find another figure to replace it. Possibly the Valkyrie so that I can fly the Techpriest around to fix the Russ or Valkyrie, or to fly the platoon command squad around so that they can issue orders to the other squads that are within 6". I'll post how the battle goes this weekend.