Exp Formula Returning Back To Normal?

1 person, 1 HS mule (non-leeching)
110% exp per kill.
1 person, 1 HS mule (leeching) / or, alternatively, 1 Bishop, 1 leecher
121% exp per kill

2 people, 1 HS mule (non-leeching)
121% exp per own kill, 33% per party member kill
2 people, 1 HS mule (leeching)
121% exp per own kill, 24.42% per party member kill.

Well at least that doesn't hurt 2-attacker parties as much. But... isn't it weird that they actually almost encourage leeching, even if it's slower, because you get better exp with someone in your party than without? No reason to go into the CS when you afk for a little bit in your party, either. This is weird. B> no cap