Elizabeth Arden Concealer Best Loose Powder For Oily/combination Skin (for Teen)???

Best loose powder for oily/combination skin (for teen)??? - elizabeth arden concealer

Im gonna buy in bulk powder and U do not know what is best?
in the country where I live, there is only:
Mac, Shu Uemura, Paul & Joe, Lancôme, Estée Lauder, Guerlain, Sisley, Dior, YSL, Paint Shop, Maybelline, Revlon, Clarins, Elizabeth Arden, boots, Anna Sui, Shiseido, Bloom Loreal, Bourjois, Clinique, Oriflame T. LeClerc, are eternal.

and what is the difference between transparent powder or loose? What should I buy?
one more question, if you use a tinted moisturizer, anti-aging products and powders (in conversation) on the stage?

thnks