Starting SFG like program for Optionals will be most productive in terms of success in MIANS, as we all know optional marks matter more.
1)This can be done by dividing syllabus(of each optional) into 15-20 segments and conducting test on each segment on every alternate day. Test can be of 5questions of 10marks each(50 marks), this will reduce load on a ‘human’ evaluating these papers.
(as ForumIAS says SFG is not a test series, but a better way to cover and revise syllabus thoroughly, then same way aim of program for optional should be same,so number of questions doesn’t matter)
2)ForumIAS can decide on limiting number of students subscribing to these program depending on their Resources availability (like limiting this program only for SFG1&2 programs and your previous students)
3)looking at current sfg list we have around 400-500 students giving tests regularly in online mode plus 100-200 from SFG1(on an average 50-60 students per optional, amd around 100-150 for optionals like Anthro, considering all these students also subscribe to these program, means it is a maximum limit), so evaluating 50 x 5 =250 questions is the task, which if possible can be distributed and timely MERIT list can be uploaded( i stress on merit list, bcoz it is one of the major factor driving us to stick to program sincerely)
4)Also the way we had current affairs test on every Saturday during SFG program, we can have a 1 essay test every weekend.
so in total this program will be responsible for covering 750 marks in a span of 30-40days.
(obviously only if UPSC postpones prelims)