In short, rely on availability counter to only show an asset and variant once per fleet, mercenary groups, or defense fleet to make reading available assets faster and easier.
Might be able to do something with the count. >1 “harasser b” in each garrison auto hide or something. The Countif command or countiffs command might be useful.
Lots of space could be saved by hiding more than one copy of assets in fleets. There already is a counter of availability on the far left. The unique command might be useful here. The idea being to shorten reading time and limit scrolling. Here is a spare calculator if anyone wants to give it a go: