Explain to me how is this "a lot of setup". There are only 4 units whose stats and skills really matter. Most of those skills are common ones that those 4 units should have already. You don't even need to grind a RallyBot because simply reclassing Katarina to Bride will give you the top 5 best Rally skills. Heck, one of my StaffBots was Libra, whom I had not touched since recruit.
Compared to those players who think you need 20 fully grinded units, this is nothing. --- This sentence is as meaningless as you.