Totally agree re TSO - FG at 80/140, fully adp3'd and the latest and greatest legends can do trash ok...but bosses...ha

The scary thing is - I did try the 5 x 80/140 and 1 x 50 - did it the 'honest' way (i.e., not greying) and walzed in there thinking I could at least clear the bosses...all I can think of is, you know that larf the guy from the simpsons does? Harharrrr ahha

Maybe have to go the way you suggested (i.e., greying) but seriously...6 accnts to whack grey mobs? sheeesh - and when you think of it:
- 135 shards for advanced jewelry (3 sets per)
- say 180?? shards for advanced AC (actually, prob cost more than 30 shards a go)
- 20 for a shield
- 40 for charms

So make it say 400 shards to get 'everything' - like that's a lot of 'grey' dungeon running. Given we have say 8 dungeons which cater for a lvl 50 group, 6 of those could be termed easy at grey the other 2 have major bosses standing in the way. So let's make it 6 shards a day (not counting the 2 x bonus shard or the totally stuffed bonus chest which a lvl 50 group can't get) - so 6 a day for total of 400 = 67ish days... /oh please, shoot me now

And when you think of it - it actually take twice as long becuase 1 accnt had to have a locked 50 so the other 5 accnts could get the shards...130 days - more than happy to grind as is my way...but 130 days worth of grey?