Fire Prisms

So, I saw the amazing sunstorm squadron statistics in white dwarf and I thought to myself (wouldn't it be awesome to be able to link four fire prisms together and get those amazing abilities?) So I go down to the local store, order the four fire prims (which with my 30% discount was only $120) and began play testing with falcon chasis to see how they did.... THEY SUCKED. Seriously, template weapons against nids did so little it wasn't even funny. I couldn't target the gargantuan creatures because they would only do one wound and against the regular nids it seemed like my fire prisms did too little to be any good at all. So here's the question, do you use fire-prisms in your apocalypse or regular army? How do you like them? What armies do you find them useful against, or completely useless? I have 3 unopened fire prisms here that I'm thinking about selling on ebay just to recoup my costs but I don't know yet.

Eldar Heavy Support

I wonder if any other eldar players find that we are completely spoiled when it comes to heavy support. First off we have the wraithlord, strength 10 toughness 8 how can you not love one of these guys? In addition to this walker we have the warwalkers... probably my favorite unit to use against unsuspecting opponents. 190 points for 24 strength 6 AP 6 shots that can be re-rolled with guide completely destroys ork units (on a side note I played in an apocalypse tournament where I ran three warwalkers with bright lances, guided every turn-it worked great against the deathwing player I was facing in the first round). Next up in the list comes the infamous dark reapers, the bane of power armor across the board. An exarch with fast shot and a full unit of reapers can shoot out 2 strength 8 ap 3 and 8 strength 5 ap 3 shots at BS 5 and 4. If you guide the squad the numbers of hits goes way up and you rip the heart out of just about any squad on the board besides terminators. Next we have the beautiful grav-tanks, the fire prism with its ability to combine fire and tage whole squads of gaunts can not be looked down upon and it's sister: the draqon wagon (a falcon with a 6 man squad of fire dragons and holo-fields) can slag any tank in the game. I have not had the chance to use heavy weapons platforms but hear that they are quite deadly if used correctly. So how do you choose what heavy support choices to take? I personally run dark reapers, a wraithlord and three warwalkers in many of my games now. What do you take and why? Any particular tricks you have learned?