There's hardly any decent info to find. 75SP should be enough, some say. Others say 50SP is enough.
I talked to someone who had 70SP and was ok. He's not such a big engager, but he does comment, and he posts once a day.
You can check it out for yourself by taking a look at his blog, comments and steemd page:
@pundito - https://steemd.com/@pundito
(@pundito, sorry dat ik je even als test-case gebruik)
Helemaal geen probleem @simplymike :)
Als JIJ me als test-case gebruikt is het een eer ;)
;0)
Even when I need to reply a lot (which is nothing else than a post) after posting my contest I do not drop below 80% RC.
For me, all is fine with the new RC rules.