How do I beat that invasion level

How do I beat the invasion level where you are holding the bridge with new horizon and tanky velkoz spawns and ults you all with thousands of chogaths and khazix, its litterally impossible for me unless i get really lucky and get that as my last level before the final boss, also the same map but more open where huge chogaths spawn and you have to go in circles while doing zero damage I beat the mode with old team but new horizon is so hard for me
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