My bishop is currently 131 and got my gen20. I can one shot wolf spiders and sell leech there. I want to make a NL so that I can boss and since bishop is so boring. But making a funded NL takes nearly 5-6b. I'm not sure whether I want to continue using the leech money for my bishop to buy equipments so that I can reach ulu2 one hit magic, or make a NL and boss to make money.
Personally I would atleast make sure I've got enough funds to wash 'my' NL to the point I'm satisfied. Then have some starting gear to kick off my bossing career once it reachs 135. After that you can mix beetwen bossing on your NL and selling leech (BS), both can be pretty dull at times.
The way that I knew I was ready to at least start leeching my main attacking class was when I was satisfied with the HP washing gear I was going to use, which is also funding for your bishop. I would say to at least get some nice equips that are not class bound to your bishop; a nice bathrobe, maple shield, yellow snowshoes, yellow adventurer cape, raccoon mask, yellow work gloves / red marker, & maybe a green bandana. So I would continue to sell leech & get some gains on the levels on your bishop & just kill 2 birds with 1 stone by funding your bishop while getting HP washing gear at the same time.