So currently for group ironman you can only do raids as a 5 man however the raid bosses are still set up as 10 man raids.
Looking at how they scaled Solak. Why not scale raids in a similar way for 3 - 5 - 7 - 10 man. The only change should be the health amount, no scaling to damage/mechanics
I know some of the community struggle to find larger groups even without being an iron man, having scaled raid content like this, makes finding and forming teams easier and more accessible at a minimum scaling for 5 man should be considered.