Help in Cologne, I'm pinned down! Options

[Winged One]

After the previous Scrin missions, I assumed this would be the same; a breeze. I was wrong, however. After recapturing the base, the Scrin just pour over the bridge. There's no stopping them! Sure, the sonic emitters are effective for a while, but no matter how hard I try to keep them operational, they still destroy them either with ground units or air support. Seriously, I had three additional emitters protecting my end of the bridge at one time and they still broke through. Repairing these emitters puts a stranglehold on my budget, meaning no reinforcements. I could sell my emitters, but at that point what would be the use? There is just no end to the flood of Scrin!

Got any tips for me?