I’d recommend this exercise when writing any wave: if I were commanding, what would be the worst pain in the ass that could happen?
For instance, your Skaaran waves. The worst you could give us would not be a stronger Skaaran, but either
a. having each act independantly. It’d be difficult to avoid aggro for an attacker, but the TSN rarely uses the kind of maneuver where this would be lethal. At the very least, taunts would become next to impossible.
b. having them move much faster. It’d be difficult to get them in time for the stations to survive.
The point is, given the elements you plan on making us fight against, how do we usually respond and how would you make that response harder?