You must be spamming the wrong units,
hellatze.
Start spamming Rapiers! They've been incredibly powerful and spammable a year ago. Since then I only remember three huuuuge buffs (first when gunship overhaul happened, second overpowered missile update, third a damage buff nobody asked for) and only two small nerfs (one after overhaul, second was engine-caused).
Just make sure not to suicide them, play safe, to use their extreme mobility and know that they are an extremely snowbally unit against air, PROVIDED you have enough Rapiers - otherwise they die like flies. Oh and stay away from aoe weapons when your swarm is clustered.
For early game you can scout with two Blastwings. If you're unlucky they'll be shut down by fighters dealing no damage (you lost 110m), if you're lucky you will scout 2+ enemy factories and destroy a couple windgens, or at least close a few solars. You also have the potential to scout (and instantly counter) a raider rush. Remember to set them to Hold fire to prevent them from suiciding on lone units and manually selfD them (take your delay and their flight speed into account).
For midgame you can use Brawlers as allterrain-artillery. Just kill all defenses except for 1k+ range-AA and Anni/DDM from a distance. If you can, place it on a mountain for safety and a range bonus. The unit has enough HP to tank a few shots - it might be the artillery unit with the highest survivability. Anyway, make sure to repair it afterwards.
Valkyries are another nice mid-lategame unit. Especially if enemies are distracted, didn't invest enough into AA and/or have their fighters out of place. Just drop a high-dps unit into enemy eco. Riots are probably the most common.
