the line was already thin this past year and aren't 4 senior starters and 2 senior backups not returning? if so then you should expect them to pursue a large number of OL.
I agree with LV & Hens67. IMO we pursue all 8, incl. our 3 commits, hoping to have 6 OL by NSD. That still gives us room for only 4 more at other positions (assuming no de-commits, of course).