I use mediabay religiously, I set custom columns and tag / and rate my sounds i ditch all 3rd party (steinberg) presets and i use it to manage my own presets with custom names / Columns. I wouldnt be able to work as quickly as I can if it wasnt for mediabay.
I don’t use battery but… you could right click > find in explorer then drag it into battery or kontakt
also for speed, i have a 60,000 sample, sample collection that i have rated, what i do is i use mediabay to move my rated files into a new directory… so my favorite sounds end up being 6000 for example… then i only scan that folder and it takes less than a second to open medibay.
obviously this might not work for every workflow… but it works for me…
also if you have the mediabay database on a SSD it helps!