What is the best wax/wax blend to use to make scented wax melt potpourri/wax tarts?

I've read so much online about different waxes to use for candles, but nothing is mentioned about making wax melts. I'd assume it needs to be low melting point, and it should be able to hold a lot of fragrance. I just want to make sure I don't order something that's so soft that it's a mess to handle at room temperature. Help!