I know this won't help much Hudson, but all of them would be brilliant! ;-) If you numberered them 1 to 8 with 1-4 on the top row left to right and 5-8 bottom row left to right, my order of preference would be 1,7,8,4,6, 7,2,3,5. :-)
I see shield patterns of V Macedonica, II Britannica, Octavani from the Notitia as well as a shield pattern based on the Great Hunt mural from Piazza Armerina. I'm building a Tetrachic army of Diocletian/Maximian/Galerius/ Constantius Chlorus. Most of the patterns are a little late for that. I'd like to see shield transfers based on the illustrations in Osprey's "Roman Legionary AD 284-337" especially the one depicting Hercules. Osprey's "Imperial Legionary AD 161 has some suitable illustrations for the Tetrarchic period.Also the shield with the box pattern from the Great Hunt mural. I realize there's more evidence for the later shield patterns and I'm building an army of a transitional period. I suggest your designer look over the Notitia Dignitatum for ideas for the later period.
LBM make loads of shield transfers for the late Roman army and he’s done them for several different ranges so I’m sure he’d probably be interested in resizing them for the WA shield size