How Jaguar decays?
yes, youre right, it does
The harness decays ALOT™ 
the rest got better decay(less decay)
according to the stats, jag decay is SO bad unless you have the money to back it up, dont bother. get nem and 5A plates and leave it at that, or run around in rascal and plates to save yourself some money, and save up for shadow armor =D
jag is in fact a rather good armor, its one or the other, or you pay for a set of nemesis with some platings,a nd pay for the platign decay, or you dont buy plates are out a lot cheaper and take bout the same decay