Today I joined the boss fight three times and got no insignias. I only ended up using up consumables and getting my gear broken. Here is the link to the third fight I did in which, like said before, I did not recieve any insignias for:
dragoneternity .com /game /fight .php ?id= 50be4ecd- 96e9- 0302- 1e3a- caef18e9d999