It all really depends on what period of the war you are depicting.
If its the early period, up to the March on Madrid, then the Tercio would have most of their Army of Africa kit, so that would be the pouches that look like the old Mills pattern kit. The Tercio was expanded by a number of banderas after that, and the equipment was pretty much hit and miss, some legionnarios got the older kit, some got the regulation army kit...In the book by Frank Thomas, he said all he got was a shirt, a hat,a rifle, and a pair of trousers, his pouches came off the body of a dead Republican soldier, along with a greatcoat.
Empress packs, use the Falange packs to bulk out your Legion force, if you are happy to look at other ranges, Burns Miniatures has Legion in 28mm for the SCW, and Askari Miniatures has some useable figures in their range too.