I currently have 23 extra gold units (hopefully soon 24). Not enough to get Dark Knight from TP but since the benefit of trying to CR/SU seems minimal (or meaningless as the case may be) I haven't spent one. I would never use one for AW w/ how easy silvers are to come by (I have too many in fact).
So what do you do w/ your extra gold units? Attempt CR? sell right away? keep around "just in case"? Use for AW cause you just don't give a fuck?
...
Bed them all cause what's better than a 4-way w/ triplets? ... (Why is this not an option?)