The Necron turn starts with all but one of the Warriors standing back up (the Destroyer stays down). The Destroyers move back to within range of the Lord's Res Orb, and the unit of Warriors move forward to get the Fire Warriors within Rapid Fire range. In the Shooting phase, the fusillade from the Warriors almost wipes out that unit, even with cover behind the 'Fish. The Destroyers add to the fire, and kill off the unit.
I'm not quite as sure on the last few turns (I'd had a few beverages by then) -- basically, the Tau on my left flank embark on the Devilfish and move out of range. The burst cannon (from the second Devilfish) and the Hammerhead finish off the unit of Destroyers, but return fire from the unit of Necron Warriors destroys the burst cannon then immobilizes the Devilfish. The Gun Drones are also shot to pieces. The last Crisis suit chooses to move out of range, and the game doesn't end until turn 7, with the Necron forces prevailing by a 3-2 margin in kill points (Tau kill the unit of Destroyers and Heavy Destroyers, Necrons kill the Commander, a unit of Fire Warriors, and the unit of Gun Drones).
In retrospect the "target fixation" did not hurt me too much, as you ended up with a Hammerhead also essentially fixated upon a Heavy Destroyer that was less than half of it's point total. I was also so paranoid with regards to cover saves that the unit of Warriors with the Necron Lord never moved out of the forest, and their shooting only served to whittle down the one unit of Fire Warriors a little (and a few of the models never got to fire they Gauss weapons in anger). In hindsight, the Tau weren't really carrying that many AP3 weapons, a Lord with a Res Orb was standing in their midst . . . clinging to a 4+ cover save may NOT have been the most useful thing they could have done.
I thought the luck was kind of average -- in three turns of shooting I could only get the Heavy Destroyer to hit the Hammerhead once (and could not score a penetrating hit), but I did roll fairly well on the "We'll Be Back" rolls and I thought the unit of Warriors on my right flank rolled well against the Devilfish and the unit of Fire Warriors (then again, just rolling 18-20 dice might also have something to do with that!).
We'll need a few more games to get things to go more smoothly (and doubtless discover more), but I did like that, every time we seemed to have a rules question, we could look it up quickly and the answer was pretty much there. That is, there was not the ambiguity that sometimes accompanied our games of 4th edition.
And now . . . who knows? Perhaps I'll paint more Necrons!.