This is a pretty bad suggestion but it just appeared in my head so I'm just going with it.
Basically, we've got a lot of prismatic bolted vees right? We all want a prismatic shield for that costume right?
How about we have 3 craftable shields then? A 1* shield that is an iron buckler reskin, a 2* shield that is a plate shield reskin, and a 4* shield that is a darkfang shield reskin.
Yes I say darkfang reskin despite darkfang itself being a reskin, but I want the 4* shield to have the darkfang shield shape.
These items would be crafted from the same prerequisites of their actual craftable versions, including the prior shield. The various visuals from different lines is purely so that you have a choice in shield appearance - some might like the small circular shield, others the rectangular plate shield, or perhaps the traditional shield style appeals to your costume.
Only thing that changes is that you need 1, 3, or 5 prismatic bolted vees to craft the items. Prismatic shields that look good for costumes + a pris bolted vee sink.
Prismatic aspects in shields don't really exist, do they? This would be a nice change of pace.
Similarly I want a prismatic-eye Tortodrone shield, just because.
also the word you're looking for is "defender".