I use Rotosound 40-100 on a Ric.
I recently swapped the strings on a Warwick to Rotos and the action went low; I guess they are lower tension than whatever was on there before.
One of the reasons for Ricenbacker's dislike of Rotos was the abrasiveness, not the tension, as they could wear the frets down. That said, my '64 has had Rotos on it since the 70s, all bar a short period where I had it set up and they put Dean Markleys on it (but I reverted to Rotos).