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

[Stepjam]

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.

Edit: Also yeah, for any content that's extreme difficulty or higher, you will need to use party finder. People generally don't queue for that kind of content with duty finder, especially not older content due to how much cooperation and fight knowledge is needed to clear. And on old extreme and savage content, generally speaking you'll need to make it unsync'd as few people want to run outdated content normally for gear.