Mahirap lang kung sa gig tapos di ka pa familiar sa ss amp nila, wala masyadong time to really tweak. Of course, that could be said about any amp naman na hindi ka familiar pero it would be good to keep in mind.
In my experience, sa mga ts pedals, the eternity was good as a standalone pedal even on an ss amp (tried it with a marshall mg, which isn't even a good pedal platform for od imo).