PvP titles and Cygnus V2 survival!

Since its only v2 run, it doesn't matter if party attacks, they're going to be attacking within crash intervals. Although they'll bring her hp down faster with just 1 person. Regardless, aggro will not change unless you attacked her (familiars included), just remember the timings and when mihile v2 does DR and you should be fine. If you have 1024 resolution screens like us, the best way to tell when to use crash is the 3rd icon buff from the timer for mihile's hp bar. Afterwards, just count 70secs and start using crash intervals to lock out DR, easy enough. Usually I have to do between 72-75 secs because this game's server CD logic fails. Pay attention to how DR looks like, both icon, and what the skills look like.

Your hp is fine if you keep up HB, and threaten lessens enough damage.