This is all provided that any insects would be real size to scale. But as we see with the wolf spider and scorpion, they are basically fantasy size huge. So they might be less swarm-like if more insects come into play, and much more like 'champions' of their respective species, like maybe another scorpion, a giant mantis, another spider, a dragonfly that's riding sized, etc.
But either way, I agree. More insects subtypes would be very cool.