A relative of the trees that produce frankincense and myrrh, like it's more famous cousins Elemi has traditionally been used to treat respiratory ailments. There are those who say that it is helpful in treating psoriasis, eczema and fungus infections of the skin and nails, but since it can be sensitizing, I prefer to use it in the nebulizer or for inhalation. I use a lot of it throughout the winter for colds, bronchitis , etc.
Some authorities recommend it for meditation blends, especially to aid in visualization.
It fights viruses and bacteria, while easing congestion. It also eases muscle and joint aches and pains Eucalyptus globulous stimulates circulation, increasing the flow of blood to affected areas. Eucalyptus can be mentally stimulating and may help increase concentration. As far as blending goes, Eucalyptus is going to dominate any blend it's used in, so it should be blended with essentials that contribute to the effect you want to achieve. Frankincense compliments its respiratory effects.