What about 2 WSs containing scorpions and
DAs, 2 Fire Prisms, and 1 Reaper unit. The Fire Prisms stay at the back of the board, and the WSs and then reapers come in on the flanks. Then some defenders to hold the objectives, and an
HQ, and your all set. For me, the Fire Prism is more tank, and more kill for the same points.
The Falcon is 115 points basic, so is the Fire Prism. The main weapons are free on both tanks. They both have Shuriken catapults (two), upgradable to one shuriken cannon for 10pts. The Fire Prism's Prism cannon can shoot at vehicles &
MCs, and infantry, the Falcon can only shoot at tanks. However, on the other hand, I admit that the Falcon does have an extra shot with this weapon, but then, this is almost exactly like the
WS with two Eldar
MLs. And finally, I also admit that there is room for passengers, where as the Fire Prism has none, half of that in the
WS.
And so, I must conclude. Think of the falcon like this. It has less choice for weapons than the
WS, it carries half the passengers, for the price of a Fire Prism. For what? Erm... less. The Fire Prism on the other hand is not a confused character. It is just a weapon that serves as an anti-tank, anti-infantry, anti-anything, heavy weapon, able to take out enemies from the other side of the board. And considering the things can combine fire, this is definitely something to be aware of.
So, forget the Falcon, and it's confused character, get WSs for transporting the troops, and Fire Prisms for shooting tanks, APCs and nasty nasty infantry!

I rest my case.
P.S. Forgot about the other falcon's other weapon, sorry folks! The best imho is the scatter laser, yet, you can get two of those on a WS, and despite the shots, at AP6, it just hardly seems to make a difference imo. And anyways, you have just that tiny bit more chance with a BS of 4, not three all the others have.