It's still better to just get a group and do it the original way.
Can't get groups for ***on Bismarck, it seems. I couldn't get a single group together to Delve for the entirety of the last campaign, SE really needs to *** off with minimum person requirements for content.
I cant speak for Delve, since thats an easy source of money now that sparks is dead, but SR doesnt really offer anything if you've finished the content.
Yes SR has a chance at loading Delve mats, but it can also load up a garbage scroll or a behemoth hide, whereas Delve has a guaranteed chance at loading two Delve mats, as well as plasm for more mats.