Time Piece Farming VS Leeching

Uh, to be a bishop or AM and train using your ultimate, you NEED to either farm for drops/pure mesos, merchant, and/or sell leech.

I don't find this to be true at all. As long as you stick to mobs you can 1-hit (or probably 2-hit for bishops) and pick up most of the drops, you will come out ahead with just the normal (1X) meso, etc and equip drops. Occasional valuable scrolls and MB's are bonus.