User blog:Daenerys Hawke/Crew Abduction Question.

I'm doing a second playthrough to prepare for ME3, I wanted to have a flawless suicide mission, which I almost got my first time around. My main problem was that the crew died. xD I was only able to save Doctor Chakwas, my question is, after how many missions(after getting the IFF) is your crew abducted by the Collectors? My plan was to do every single possible mission before getting the IFF, but there's still the matter of Legion's loyalty mission that HAS to be taken after the IFF as that is where you get him. So just wondering how many missions after getting the IFF do the Collectors come and attack the Normandy?