They are a t3 unit but I dont see a purpose for them unless i want to sneak in 2 squads into the enemy camp to wreck buildings. I havent had much luck vs units.The wraith units are slow even with fleet of foot. Atleast the wraith guard( for all its other problems like rate of fire etc) has a long range which is good against speeders and walkers and is a t2 unit. By the time the wraithblade becomes available at t3, the enemy normally has lots of tank busters and lascannons. Any suggestions?