t15-t16s Alva Temples tier 3 maps room drops.

Dusty charts drops 80% of white/yellow maps.

Where's logic here?

High level Alva temples 82-83 monsters area level drops low tier maps from a tier 3 room.

What the point to build that room if it drops 1x red map from each dusty chart?

Make a guaranteed t14-t16's from dusty charts(80+ temples) and at least 7-8 maps drops from each chart?