My ideas of the secondary rune tree

ADC that needs sustain in lane -Primary precision with fleet foot -Secondary resolve

ADC that scales with AS -Primary precision with lethal tempo -Secondary resolve

Burst assassins -Primary Domination -Secondary sorcery or resolve

Mage not burst -Primary sorcery with meteor -Secondary resolve or domination or inspiration

Mage with shields -Primary with aeries -Secondary resolve or domination or inspiration

Tanky bruiser -Primary resolve -Secondary precision or domination

Tanky initiator -Primary resolve -Secondary sorcery

Tanky support -Primary resolve -Secondary sorcery or inspiration