Depends on whether they're worth it or not.
Softube has no summing plugin, the ones I'm aware of are Waves NLS, Slate VCC, Sonimus Satson/Britson (pretty decent), SKnote Stripbuss and some others (like Airwindows I think), but those are the ones that "talk" to each other and add mojo and interdimensional upper midrange clarity and transient pace......makes the music more "danceable".