FB hadn't really been tested for anything, as plastic flat tips only became more popular recently. Again, tornado stalling was considered a negative thing until recently.
I guess dismissing TR145 isn't fair, though I know where Jan is coming from, I initally thought the same, but then realised that it hasn't really been used offensively. Still, I think R145 or SW145 would be better options, as they provide more smash, which is spoiled slightly by the rollers on TR145.
TBH this is the standard: MF [Attack Wheel] [Heavy/Recoil Track] [rf/r2f/lrf] formula.
BD145 is a bit different to that due to the fact it doesn't help KO so much (it does help nudge opponents out though), but yeah, this is basically more of a "Meteo L Drago testing thread" than a combo thread, if you're trying it with so many different tracks.
MLD is never really going to have the KO power of LLD, TBH. Maybe on a weighty track in absorb mode, it could do the "rubber KO" thing, I'd consider R145, as it's the second heaviest track available, above other things. I think I've used MF MLD R145RF, and found it pretty "Eh", FWIW.