Another benefit to chopping the Jetbikes up into smaller units is that many tournaments have a composition score, which virtually always favors many troops choices. By breaking those units up into smaller units, you would have more troops choices which would probably boost your comp score. Also, the rumors for 5th edition state that only troops choices will count as scoring units, so not only would breaking them up allow you a couple more scoring units right now, but in 5th you would effectively be doubling your scoring units by breaking them into units of 6 Jetbikes.
If the Farseer is planning to ride around with the Jetbikes, your Wraithlords are going to have some Wraithsight issues. You may want to remove the Jetbike, and just have him walk near the Wraithlords. They will be able to protect him from close combat as well. Perhaps in this case you could swap Mind War for Doom, and use the Jetbike points to upgrade the Wraithsword to either a Starcannon or a Missile Launcher.
Alternately, you could try Mad Cat's suggestion to bring some Shining Spears. In this case, you may prefer an Autarch on a Jetbike over a Farseer on a Jetbike to ride along with the Spears. In terms of just looks, an Autarch would also be more believable as a Troupe Master. In fact, you could just convert a Troupe Master model to ride a Jetbike and say he counts as an Autarch. The Troupe Master already comes in two pieces: the legs, and the torso. The Jetbike rider also comes in two pieces: the legs, and the torso. Just glue the normal rider's legs onto the Jetbike, and glue the Troupe Master's torso onto those legs. If you decide to give the Autarch a Power Weapon, no conversion of the arm is necessary, as the Troupe Master already comes equipped with a Power Weapon. You could then do whatever you wanted to with the other arm: leave it as is, cut it off and add a rider arm to hold onto the handle bars, put a fusion gun in it, whatever. Maybe use a little green stuff to smooth over the rider's legs to look light tights, add a loincloth, etc.
One final possibility is to remove the Wraithlords altogether (which would be a good idea if you decide to use the Autarch over the Farseer with some Shining Spears) and in place of them bring two more Falcons. You would need to clear out some more points to do this. One way would be to cut the Harlequin units down to 6 Harlequins each, and stick each unit in a Falcon. This would give you a very fast, mobile army that had a bit of firepower, as well as a rather mean force in close combat. Your anti-tank firepower would be fairly limited to rending, a fusion gun, pulse lasers, and the Spear's lances. Perhaps you could fit in a Vyper or two with Bright Lances. Maybe something like this:
Autarch with Jetbike, Fusion Gun, Power Weapon, Mandiblasters
6 Harlequins with SS and Kisses
6 Harlequins with SS and Kisses
6 Harlequins with SS and Kisses
6 Jetbikes with 2 Shuriken Cannons
6 Jetbikes with 2 Shuriken Cannons
6 Jetbikes with 2 Shuriken Cannons
6 Jetbikes with 2 Shuriken Cannons
4 Shining Spears, exarch with Star Lance, Withdraw, Skilled Riders
Vyper with Bright Lance
Falcon with Scatter Laser, Shuriken Cannon, Spirit Stones, Holo Fields
Falcon with Scatter Laser, Shuriken Cannon, Spirit Stones, Holo Fields
Falcon with Scatter Laser, Shuriken Cannon, Spirit Stones, Holo Fields
At just a glance, that looks like roughly 2000 points to me. I hope I have given you some ideas.