Exactly. Free slag and shock means putting like two rounds of a corrosive or fire weapon into them is enough to kill them (if Ruin doesnt just finish them wholesale). Also the slag/shock makes badasses stupid easy. And it tracks, so flying enemies cant get away.
Finally reached lvl 31 and Ruin is just as good as I had hoped. Everyone but Loaders go down with just the Phaselock and thanks to the slag, Loaders go down real fast too. Maya is still a glass cannon, but Ruin destroys everyone.