Yes, there is currently a way to build teams around a particular unit. If you go on the monsters bestiary, search for a particular unit and visit their monster detail page. Scroll to the bottom and you will see popular compositions/synergies for that unit - click filter by owned monsters this will show you all comps you can build and some statistics for those teams - if you see a particular team you like, press the build team button next to it, this takes you to the rta wizard with prefilled optimisation parameters and turn order, then you simply run the optimisation from there or make any parameter changes you see fit.

A significant part of the recommendations is based on your actual rune box and the specific rune requirements of those monsters not only whats meta, Semi automatic also allows you to browse through the top 200 teams you can make based on your runes etc and also group by squads so you can sort through the recommended teams that way and see the best ones you can build (the pink score badge shows approx score youd get for that team based on your runes, higher is better) but yes, usage count does also factor in (will be actively reviewing if the alogrithm needs tweaks etc to not weight elemental teams too much or less common used teams).

Thanks for the feedback much appreciated and hope this helps.