A Green Bird
I know he only gains a fraction and needs more than others to level up but just one of his soldiers level up to Diamond rank and he didn't even have a small increase in his gold rank. judging by that scale the other human lords wouldn't even be in the bronze rank if they have to kill the same amount
GhostOwl:Lords have a higher threshold as well as only get a fraction of all the kills. So unless he does the killing himself will be a slow roll, even with his blessing boosting the numbers.