I just have to ask. In this well thought out and awesome thread about smn dps

http://docs.google.com/document/d/1PpAuOcKTF0SaGq8G9CWXTWqMsIU3IJxzqXd3LQBPy1E/mobilebasic

it says you can use contagion before bahamunt. Clearly all egi buffs fall off so I just have a question. Why do people do this? Am I missing something? Let me know and thanks!