I assume the FA warriors also have wings.
Well, You may find that fast skimmers give you trouble. They're hard to catch and just as hard to hit once you've caught it. if you don't play many eldar/dark eldar, don't worry about it, but if you do, you may want to invest in either some VCs if you don't want to catch the skimmers, or bioplasma if you want to catch them but can't hit them in CC.
You also currently have no way of dealing with a monolith. If you never see them, that's great. If you do... good luck