Oh yeah it's easy man. The two towers have wizards in them, draw one out at a time and kill it, followed by a shrieker. Kill the shireker and move to the other side and kill the wizard and shrieker there, Kill the deathsinger, then everyone run to the green crystal where you start the crota fight, or fight hoards of knights and acolytes which ever. I usually fight the knights since there are about 50 of them and they are hard to get around