said it before, will say it again. ANY soul boost geared person has better gear than when either raid was introduced. main reason not finding a group is the soul fact nobody recruits for them in the first place.
Lack of event rewards = no need to run infinite iterations. Blame NC if you really have to blame anyone but yourself.
as for IA there is revive charms, so same 4 low dps can sacrifice twice (or bring SUM/SF). if you'd think we need rookie 2024 guide for both raids, I'd be puzzled if someone would create them *wink*