Or at least the first one is. I haven't tried the Aurra Sing one, though. Thinking about it, that one might work, since Sing gains bonuses against toppled enemies. I'll report back after I've given it a go.
But what is obvious is that the "kitchen sink" CLS team that was created to deal damage to Final-Traya at the end of Wave 4 is a bad team for First Traya in Wave 3. It looks very much like they might have one squad for wave 3 and one for wave 4 BOTH required in the mid boss, instead of separating them so that only Wave 3 teams are required for the mid-boss and only Wave 4 teams are required for Final Traya.