Tabled turn 1

Not me actually, the guy I was playing. I felt terrible. I recently started playing with a new group, and one of their members also plays Tau. I hadn't gotten a chance to see him play, as he has been unable to make our game days. However, some of the other guys thought that I should get together with this guy and give him tips, seeming as I can almost win, and he gets trashed. So we kinda set up this thing where he and I would play a couple of other guys in a large Tau vs Necron game. Well, that's still a week away, but we(Tau players) decided to get together and do a practice 500pt game and talk strategy. My list consisted of a commander(tooled to use my new template), 1 FW squad, 1 Kroot, 1 Pathfinder, and a Railhead. I held my commander in reserve to deep strike with his flamer, airburst. I deployed my Hammer head forward, the pathfinders in a building, the firewarriors in the back on the right flank by the PF devilfish, the kroot infiltrated onto a central objective. He deployed a single, large firewarrior squad with drones and a commander(~fire knife) also with drones. I pie plated his firewarrior, killing a shield drone and 8 firewarriors, by far my best shot ever(no I know why SMs tear through me). The rolled 10 for Ld and ran. In shock I turn the turn to him. The firewarriors rolled another 10 and continue to flee. This is when I asked if he had any reserve and find out no, that's his entire force. I think I know why he has trouble bringing it on. He only had 450 pts, 250 for the commander, the other 200 for the Firewarriors. He had tooled them up with everything, plus a shield drone and a marker drone. The commander had a shield drone and marker drone as well. His plan was to shield my army with his as a sort of meat shield. I didn't like the plan before and after seeing what we would be throwing away points wise, I hated it. I pointed out what he could do if he toned down the points. More squads a definite plus, also a dropped marker light drone alone would have given him points for a broadside at least. I honestly expected him to have vehicles, I tried to plan around taking them out, they didn't exist. I wish I had scattered a little actually, just so I could have seen how he plays, but I hope it helped him with army creation a bit. Maybe different styles, I don't know.