Hearthpwn bugged maybe. It didn't posted my second response. I clicked and taelon WAS your highest cost card. Grabbing a 4 cost mana minion with taelon is just dumb.
You have to scroll on the deck list. He has double skull, blackthorn and alex. Those are all midrange cards though and aren't hitting much on turn 7 besides some deck thinning. Alex doesnt belong, inquisitor is much better as it can clear a taunt AND go face the same turn, plus you can run 2 of them.
Tbh, this just looks like midrange DR demon hunter with worse cards and not a super aggressive deck at all.