These mobs are definitely BLUs. I've seen them use Wild Oats and 1000 Needles, but the lag is usually bad enough I can't see much else. 1000 Needles is funny during Besieged- there's usually so many people around it does 30-40 damage. They can be Aspir'd from, too.
I've seen them use Azure Lore, but I couldn't tell you what kind of increase it gives to their blue magic spells. Also, the HP percentage at which they use their two-hour seems completely random.
Edit: Forgot to add this- the Mamool Ja Entrancers carry a one-handed sword, and I have seen them use the weaponskill Vorpal Blade. Hit some poor NIN for 800! That's the only WS I've seen them use...if they don't use Vorpal Blade, they use the typical Mamool Ja TP attacks: Warm-Up, Firespit, Somersault Kick, etc..
Edited, Jan 16th 2007 2:51am by smurl