i think scourges have become a much more viable option to. i run this combo on the weekend and after the 1st round of shooting he was targeting them instead of my ravagers with tank killing weaponry

10 scourges 4 haywire blasters, start with a naked heamy to give them pain put them next to the cheesy farseer option, hit them with guide and fortune 3+ to hit with re-rolls, that glance on2's while re-rolling AS and all though i didn't try it you could buy a defence line and start them behind that as well

from what i can see unless you roll absolute c**p you should be popping 1 vehicle a turn.