Pondering early 4th job strategy

Well here in windia, I have no problem selling leech for just 1mil under what a bish charge with same HKO. In fact, I'm getting a lot of business since bish doesn't deal high enough damage to mobs other than holy weak, and the ones who do, are not enough for the entire leeching demand, so I actually have buyers all the time demanding 1HKO harp, 1HKO wyvern, and 2HKO newt.