Being able to feely cast Ruin 3 if you wish to hold or push the tri colored Ruins. Example being that Emerald Ruin 3 is actually a loss in dps against casting Ruin 3 when doing lvl 70 content. Able to make the choice to hold Topaz Emerald 3 for dps neutral movement and entirely skipping or holding Emerald Ruin 3 for emergency movement is nice to have.

At 90 content you will always have to fill with a Ruin 3 and you may need to use it in between your legos.