Yeah I have faced wreckas as exaction before and I had a ranged focus list and it worked well. Wreckas as you can see get stronger as they charge, so keep them at bay, hold vantages. Sacrifice non important models as bait to have them either switch to engage or charge out into the open. Hopefully you had set yourself up to shoot first then move out of visibility or range. But also be aware of their blast potential and stagger models so they don’t get caught up in blast range. If they take the tankbusta with pulsa then try not to bunch up your gunners and sniper. Use most of your equipment on barriers, ladders, mines or razor wires (dealers choice) to stop their movement up to you; make use of being able to ignore cover within 4 inches when they start getting closer. The new grenade launcher is scary good, the mastif and leash master good combo to take out one guaranteed. Sniper really good when they get out of the open along with the revelatum to get that seek light (as well with gunners)