Hah I think its funny how different groups have different preferences for affixes/go to dungeons. I'd personally prefer Sanguine/Volcanic every week, we did really well with that one (and that's even with DPS that don't seem to be able to remember not to stun at low HP with sanguine). Our only ranged is a BM hunter who has ADD and never stops moving while DPSing even without affixes, so Volcanic has a very minimal impact for us, except as you mentioned in Court of Stars, fuck that end boss. Funny thing is though we run a Holy pal, so Overflowing is actually pretty awful for us. Holy shock is still bugged with it, so a crit at the wrong time can put a 3 million absorb shield on me as the tank, making the next pull interesting.
Interesting that Court of Stars is your go-to, my group hates that place. A lot of ways things can go wrong, like missing an interrupt on the construct heal. But my main gripe is that the buffs/items that spawn before 2nd boss are random, and depending on which spawn it can change your clear time by 3-4 minutes (got bless the hunter trap). I just hope we don't get a +10 CoS this week, I doubt the last boss is possible with Tyrannical right now.
Our go to for anything under 7 is actually BRH, when they nerfed the timer there it seems to be very easy to 3 chest now with 1 affix, though it becomes one of the hardest places as soon as you add the 2nd affix, almost regardless of what it is. As for 7 and up, we always seem to do best with Vault, probably because it is so front loaded and if you get a good start you finish all of the hard parts by the time the 2nd boss is dead.