I only have 500 at the moment.

1) I do, yes,

2) I average around 30 + a day.

3) Guildhests. Though I tend to get Expert Roulette more so. I personally don't fancy Expert and tend to quit if I get them in succession - especially if there are no firs timers. I'd rather another DPS who purposefully queued for it get those rewards; as I'm not teaching anyone anything at that point. I doubt I can teach three Perfect Legends anything about a dungeon they've done for the umpteenth time.

4) The requirements are fair. Exceedingly so. No criticisms there.