Just got an Angm. Longiscott "OC"-how do I care for it?

[Judi]

While at our local nursery for bird seeds, I found that a beautiful Angm. Longiscott 'OC' superbum x scottianum followed me home I don't imagine it is an unusual plant as it was very reasonably priced (I think at $19.98 ?); and supposedly just arrived from Hawaii just 3 hours before it found me--from H&R Nurseries. Does anyone know what hybrid it is? Is it an Anguloa and something else It is in a small pot looks like lava rock with some moss growing on the top--very root bound, I could hardly remove the tag because of the roots, and there are loads of slim roots growing outside the pot. Some of the lower leaves have black at the tips, but I was assured it was normal damage caused by overcrowding and shipping and that since the top leaves are fine, I shouldn't worry????? I was also told it was bone dry when it arrived at the nursery--it was just watered and misted before I got it. So should I repot, if so in what, and how do I care for it? My other chids are the usual Phal, Onc, Den, Mtdm, Bc, Paph, so this is a first for me—hope it’s not more than I can handle. Since I live in the northeast and don’t have a greenhouse, mounting really isn’t an option for me.