question regarding ep2 online

[Alia]

so....I've been trying to S rank Ambition of the Illuminus, the last of the Ep2 online missions? Part one was easy with Curtz, but I can't figure out how to S rank part 2. I don't know how much time I'm allowed to have left. Can anyone help? I know you can't let Lou die.

[DozenMarks]

Not sure. I finished with only like a minute-ish (maybe a bit less?) remaining and got an S-Rank for it.

If need be, go do some Free Missions and come back when you're stronger and can kill the enemies quicker.

[Hrith]

I did it in 1:07 ;s

But I think the alotted time is 1:45