You should also post how many models each squad has. I'm not going to sit here and do the math to figure it out
My first recommendation is to change your list around some, drop some worthless stuff, take different powers,
WS, etc. But, that's more of an army list discussion
For your current list, without any mech, you're going to have to start everything on the board except the Scorpions (who should be outflanking). Keep your Farseer hidden in a Banshee squad, but switch him to wherever you need. Use your
DA to block incoming fire, and close distance to your opponent as quickly as you can!
The Banshees and the Wraithlord will have a hard time getting into
CC that doesn't want to tangle. Try and use them together to outmaneuver a squad and force it into
CC with one or the other.
The Dragons will probably be dead long before they get in melta range. Maximize their survivability by keeping
DA in front, and keeping Fortune on them. Your only backups for anti-vehicle is the Wraithlord and the Farseer. They'll have a hard time ever getting close enough to a tank to assault it, so you'll end up relying on the
EML and Singing Spear to take stuff out. One
str 8 attack and one
str 9 attack a turn is going to mean you won't be able to handle much.
Expect a mech army to mop the floor with you, but you should be pretty well against a horde army of Ork or Guard or Guardian Eldar.