Is there a good way to find PUGed raids aside from duty finder?

[Flay_wind]

For Wreath of snakes EX, you'll still need 2 tanks unless one of them is paladin or gunbreaker. During curse, PLD/GNB has to use their invuln so they take zero damage (DRK and WAR can't do this because they still take damage during their invulns, they just can't die, but if they take any damage during curse, they explode and wipe the party). After that, you just have to have enough DPS to kill Seiryu before the second curse happens, because their invuln won't be back up before then.

Wreath of Snakes can be absolutely done with just solo DRK. You use TBN + Shadow Wall and you're practically set.