The tiny dark spots on the first real leaves are burn spots caused by nutrients. I a sure I've dropped some on other leaves as well, but they do not seem to care (really thinned out mix) - could this be a sign of an overall sensibility of this particular plant to the nutrients?
Mimikry has reacted very well to the increase in temperature to 77F and RH to 65% along w/ the first (very diluted) feeding. Lights were also increased to 330~400PPFD @ 18:6