I am starting a campaign with a level 5 shield champion and 10k gold to spend. I am thinking of doing a mithral heavy throwing shield with a master worked reinforcing boss an spikes. However, I was wondering if maybe spending 2k extra gold for adamantine is a better option and just give up my Necklace of natural armor. Or, should I just get two shields? This is my first shield character, so any advice I can get would be much appreciated.