I don't have much more to add than what has already been said. Personally, I choose who gets Black Sludge and who gets Lefties on a case-by-case basis. I think, in all honesty, that it just comes down to personal preference; at least, that's how it's been in my experience.
Black2 FC: 0949 0237 6130
Black2 Japanese FC: 2131 5174 8319
PM me for battles until I can use the WBF again.
I use legal hacks. If you lose, and you cry about it on the forums, you lose even more
Also... Horse. THUNDER horse.