Missions you mean by quests? Ad what are you doing worrying bout mithril at your stats! Once you've grown, that is when it helps
It is kinda screwy... I got 5 kos, but no Mith. >.< Then the next war, I had only 1 ko, but 7 Mith WTF
KO's have nothing to do with the mith u earn...I think it's based on the mith u spend mostly and maybe on how active u were...
YOUR MISSION To to WAR. Join the estoc edge trials. Destroy your enemy. Collect copious amounts of KOs on the battle field. my work here is done
/lock, op's question answered: it will never be possible to gain mith except through war (most likely).