I just cleared Ravana last night!!!

In my experience the biggest problem people have is not with Liberation, but with the purple circles that come after it. Particularly for Swift Liberation (Divebombs), the area splits into 4 quadrants directly after that (bacon strips), and it always seems like players will drag multiple purple circles go to the same spot. You gotta have quick reaction speed because there is only about a second to choose which way you run before the bacon strips cut you off. The fire dot + purple circle is guaranteed K.O if you're not a tank blowing cooldowns, believe me I have tried using Vit Potions at this point and it doesn't help. Even 1 death here could spiral out of control into a future wipe, especially if it is a healer. There are many unavoidable AOE damage spikes in this fight that can kill you with Weakness, even at full health in high end gear (180+ and still die).

The best way I have found to pass this part is to...

(1) Set waymarks on DIAGONALS, not the traditional North/South/East/West. Instead put them on the intermediate directions of Southwest, Southeast, Northeast, Northwest. The bacon strips are always on the cardinal directions so the safe spots will be in the diagonal corners. It's easier to see, react, and run to the waymarks if they're the safe areas.
(2) Assign players to specific quadrants. There actually is a pattern on who gets marked. It should be 1 DPS and 1 tank or healer per spot. I won't go into detail why, but if you do it this way you will never get more than 1 circle per quadrant. It's a similar idea of assigning people to spots in Shiva EX (also similar that people will accidentally run to the wrong spots). DICUSS THIS BEFORE PULLING.

Sorry to hear about your Party Finder woes... I'm on Balmung, one of the most populated servers, and we have problems too. There are very few learning or clear parties, it's like most of the parties that show up in PF expect you to be flawlessly perfect. The few learning parties you find often can't pass Butterflies or worse can't break the first Shell. Sometimes it feels like there is no middle ground for people who know the fight but may not be able to execute it perfectly.